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The Cutting Room Floor:Content to expand

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See also: the version of this page for prerelease materials.

This is a list of games with known content, but no article on the wiki. Once they have an article, they go into to do or to investigate.

If you know of something in a game that's not here but don't have enough knowledge to write about it (and there's no article, or the article really sucks) feel free to add something to the list here and hopefully, somebody can look at it. Try to include the details you know to make it easier (websites, codes, etc.)

Before adding something here, check out the common things page to see what not to add.

Once an article is created, move the information for a game onto its page, optionally using either of the to-do or investigate templates depending on what needs to be done.

The Legend of Zelda: Link's Awakening sums it up best:

Here is your
 clue.
Make all the red
 blue.

Multiplatform Games

Apple

Apple II

  • According to programmer Steve Baker, Sporting News Baseball has "hidden secret pics and animations, but it’s been so long I have forgotten the 'keys' (to activate them)."

Mac OS Classic

  • Ares has revision differences between the Changeling Software and Ambrosia Software releases. There may be unused stuff only in the Changeling Software releases too.
  • Might and Magic: World of Xeen has an invisible folder containing industrial remixes of the game's music. The copy currently posted on Macintosh Garden was not imaged from the original media and lacks the secret folder.

Mac OS X

  • Angry Birds has some unused graphics, leftovers from other versions, and unused text. Investigate what DebugConsole.lua does.
  • MilkSnake has unused text from here. Breaking the game (how?) gives you a million points.
  • Quinn - replacing ConnectPanel.nib with DebugPanel.nib will open a debugging window when clicking Connect to Server.

iOS

Atari

400/1200XL

  • Lots of Easter eggs in various games (mostly developer messages) can be found here.

2600

5200

  • The Atari 5200 BIOS has the message "copyright atari" in the ROM. Is this used?
  • Lots of Easter eggs in various games (mostly developer messages) can be found here and here.

Jaguar

Lynx

Atari ST

  • These pages mention some hidden messages in several Atari ST games.
  • Alternate Reality: The Dungeon has an anti-piracy method, which caused two unbeatable FBI agents to appear. Transferring a character from the city also caused these guys to appear, which required a bug fix to patch in a disk exchange program.

Commodore

Commodore 64

  • This thread from 2008 mentions a lot of unused things in various C64 games (sprites, hidden messages, other crap). Someone with better knowledge of old C64 games than me should check this thread out (I only code the C64, I don't play it...). The guy who ran The Games That Weren't has a blog post about this, plus more.
  • A tape loader used in various games (Sanxion, Mega Apocalypse, etc.) apparently contains the string "HACKERS FUCK OFF AND DIE" (of course this doesn't show up in most/all of the cracked versions that have completely different loaders). By extension, the string probably appears in a number of different games. I wonder how that should be handled?
  • "Going back to the C64 days, loading & resetting Thing on a Spring allowed you to perform SYS 49152 to access a complete disassembler. Similarly, a reset of Rambo followed by hitting the restore key entered the music editor." Source:Sean Dunlevy
  • Three Weeks In Paradise apparently includes a message from the programmer where he mentions, among other things, how he was not paid for his work on the game.

Commodore Plus/4

Amiga

  • Ambermoon is the sequel to Amberstar RPG, and you could invite some of the developers into your party inside the cheat room.
  • Feud has a hidden message under a bridge (likely by Ste).

Microsoft

DOS

  • A handful of other Origin games have confirmed debug modes.
  • Gold Box games in general (these are the old SSI D&D games such as Pool of Radiance). There are several debug line commands as seen here. It is curious that some of them serve to skip the copy protection, yet were left on the commercial versions.
  • Commander Blood has some unused movies and graphics that would later be used in the French-only sequel Big Bug Bang.
  • Dominus has unused text, and maybe more content?
  • Ishar when played on DOSBox 0.74 gets a weird glitch, it shows a language selection screen which shouldn't appear, as far as I know, this game is only in English. Were the translations scrapped? Are they just currently lost but the English version contains files for other languages?
  • Knights of Xentar, the US localization of Dragon Knight 3 has regional changes and a censored revision.
  • Push-Over has an unused music track.
  • Redneck Rampage has at least one instance of a hidden message (e.g. Down the blocked-off road in the first level; "Did you really think there was something here?").
  • Sid Meier's Civilization has revisions. For one, later copies added a button to rename cities.
  • Super Street Fighter II has text from the SNES version.
  • Test Drive III: The Passion has a fully-fledged track used in the main menu, but only a small portion of it is actually seen. There are also oddities in two of the other maps and some weird stuff.
  • Tiānshǐ Dìguó II has a hidden sound test and some apparently unused music tracks. Info here.
  • Torin's Passage has a fair amount of unused stuff.
  • Transport Tycoon, Transport Tycoon: World Editor (featuring the scenario editor and exclusive mars alternate graphics set) and Transport Tycoon Deluxe have some unused stuff and some interesting version changes, such as the original release having real-life vehicle names as opposed to fictional ones (The supersonic plane being called Concorde instead of Yate Haugan). Allegedly, this was a change pressured by the American legal department of Microprose. There is also plenty of interesting prerelease stuff, such as the early unreleased concept version. OpenTTD has an article though.
  • Wing Commander III: Heart of the Tiger has some hidden messages, debugging stuff, and some other weird miscellaneous bits.
  • X-Com: UFO Defense has at least an early demo showing the original title (X-COM: Terran Defense Force). Also, the several versions and releases of the original game may show various changes.

Windows

  • 100% Orange Juice has a prototype video which features many graphical differences and some cards that were cut out from the final release. There are also placeholder textures still in the current build of the game.
    • There is also an unused panel in the game files. It is fully functional and can be inserted into a map using a map editor, and it works just like a regular blank panel, but the texture is different.
  • 428: Shibuya Scramble has config jsons, text for debug functions and dummy images
  • Pretty much every Humongous Entertainment game ever made.
  • Games developed by ImaginEngine always seem to have unused graphics.
  • Every game bundled with Windows Vista and 7 seems to have debug modes which can be enabled with registry tweaks.
    • Not only that but all of them have prototypes within the various prototype versions of Vista. Some of these are documented on X-Cult, but not all of them.
  • Every MSN Zone game bundled with Windows XP and ME has commented out text in the config file. There is also data for a debug menu containing two items: Event Spy and DataStore Viewer.
  • Betas of some Windows Entertainment Pack games can be found here.
  • What does changing fDebugWindow="0" in any of the Living Books games' description file (*.512 or *.LB) do?
  • THQ's MotoGP games have documented (in game's readme) debugger using telnet. Apparently some of the debugging can also be done by editing the motogp.cfg file.
  • Ace Lightning has a debug menu, which can be seen in this YT video.
  • Advent Rising has a massive amount of unused content that equals around 5% of the game's size ranging from weapons to unused features.
  • Alien Shooter 2 One unused weapon, the LIBERT pistol, only accessible via weapon.ini modification. Incomplete strings of a combat shotgun and napalm RPG.
  • Alien Sky has an unused question mark power-up, graphics for side turrets for the special weapons, unused company logo idents, and one or two sound effects leftover from Atomaders.
    • A "DEMO" graphic that is only used in demo versions of the game, and a splash screen.
    • Opening Resource.tdf in a text editor such as Notepad will reveal unused text strings from Atomaders in different languages, as well as some text strings from the demo version of this game.
    • Videos here and here show a version of the game where certain graphics have undergone color changes.
  • Anodyne has some demo leftovers within the AIR archive (see ".gitignore", "index.html" (references a "Seen.swf"), and "META-INF\AIR\application.xml")
  • ARMA 2 has a pretty unique Anti-Piracy that causes numerous effects along with a few unused weapon attachments.
  • Assetto Corsa has a Japanese version released on DMM Games that includes an additional built-in track, Fuji Speedway, and also breaks some tools such as Custom Shader Patch.
  • Atomaders Some unused enemy projectiles.
    • An unheard blip sound and an ammo load sound.
    • A splash screen for "Atomaders Deluxe".
    • Unused graphics for the back of the safety barrier.
    • Some versions of the game have the downloadable "Leda Prime Part 2" already included.
  • Automobilista have some of their unlicensed Formula One liveries altered after a sudden delisting (no pictures though, since the blog was shut down).
  • Banished has a debug mode that can be reenabled with the use of mods.
  • Battle Arena Toshinden 2 has unused mugshots, likely placeholders.
  • BIONICLE: The Legend of Mata Nui is an unreleased game that was recently found and released to the public in February 2018.
  • Blade Runner has a lot of unused sound files. See this link.
  • Blasterball 2 has an unused enemy. Info here.
  • Chessmaster 4000 has what appears to be 'outtake' sound files. (Look for ones marked with 'A')
  • Clannad has a debug menu and possibly more.
  • Colin McRae Rally 2005 has a lot of test files and test tracks to check out.
  • CSI: Slots (Windows) has a cheat menu and a development log.
  • Dracula II: Ascension has a test.sav in the game files.
  • Eversion has some unused eversion levels pre-1.7.3, as seen in this video. Using a level editor shows that there might be one more... World X-8 gems were also unused before 1.7.3 introduced Time Attack Mode since you normally need all the Gems to access X-8.
  • Euro Truck Simulator 2 has possible unused locations and revisional differences.
  • Fuel has a debug menu.
  • GonzagoGL, the Spore prototype, has a lot of unused content, like a pretty well-programmed tribe, city and civilization stages, unused models, including an aquatic stage Willosaur, and others. Also might be good to find a way to actually play the other stages and find out what sniff test actually does.
  • Grim Fandango has some alternate views of locations.
  • Gunbound has a few prototypes lying around somewhere.
  • The Hall of Tortured Souls (a hidden game in Excel 95) has a picture of the developers accessible by doing a 180-degree turn and typing EXCELKFA.
  • Hifuu Nightmare Diary ~ Violet Detector has leftovers from Touhou Kanjuden: Legacy of Lunatic Kingdom and Touhou Tenkuushou ~ Hidden Star in Four Seasons in its HUD.
  • Ibb and Obb has lots of leftover content from the PS3 version, as well as a drawing of an anime/manga eye that isn't used in either version.
  • Iji: an early build was released on March 21, 2011, as part of Scrap Pack 2.
  • Jump Force uproject file
  • Katawa Shoujo has at least one unused graphic, featuring an unknown character and a developer comment. It's inside Hanako's archives, and is called hanako_emptyclassroom_bg.
  • LEGO Stunt Rally has some unused track pieces.
  • LEGO Universe has unused NPCs and music, and possibly more. There are also multiple prototypes of this game.
  • LISA: The First has many remnants of a cut fight against Marty.
  • London Racer has a debug command
  • Mario's Game Gallery was re-released as Mario's FUNdamentals. There's also a version with a different menu.
  • Mortal Kombat Trilogy has unused text. Possibly unused sounds also.
  • Nexus: The Jupiter Incident has a unique demo that was entirely different from the retail version. The retail has some testing maps leftover from development as well.
  • No One Lives Forever has unused files in NOLF2.REZ (such as unused sound files under VOICE)
  • Odium (aka Gorky 17 for you crazy Europeans): I've only taken a quick glance at the game files. There was lots of commented-out dialogue and some removed enemies, but I haven't played that game for so long... There's definitely unused goodies to find in there, though.
  • The Outlast 2 demo has a copy of Don't Stop Believin' by Journey in SB_Positional_Proto.bnk.
  • Peggle Deluxe can be extracted using the following guide and reveals a leveleditor folder, PeggleBeats.mo3 can be opened in OpenMPT -- and the guide to extract Peggle Deluxe notes that it's possible on a multitude of PopCap games.
  • Puyo Puyo Fever has leftovers from the English localization that was not selectable in the PC version.
  • Quantum Break, like Alan Wake, gives the protagonist an eyepatch if playing a pirated copy.
  • Sega Rally Championship has a debug menu that can be re-enabled through an unofficial patch. That patch changes jne 004F7F84 to je 004F7F84.
  • Septerra Core: Legacy of the Creator has unused items and debugging functions.
  • Shank and Shank 2 have debug and test level folders in data-pc\levels.
  • Shenmue III and its Backer Demo have a hidden YsNet debug menu.
  • Shrek 2 has a few unused textures and a test map (Entry.unr).
  • SOMA has unused enemies, models (such as a cut hospital level), animations, textures, dialogue, music and a file called _supersecret.rar containing prerelease materials. This video sums some/all of it up.
  • The Steam version of Star Wars: Battlefront II (2005) contains a few unused maps, the most interesting of which is a port of the map "Rhen Var - Citadel" from the first Battlefront.
  • Star Wars: Knights of the Old Republic II: The Sith Lords has lots of unused content in general (the ending's a good place to start) and definitely needs an article. Also, revisional differences. Such as the Steam version's update on July 21, 2015 adding controller support, achievements, cloud saving, and more.
  • Street Fighter X Mega Man features an unused theme for Yang's stage, from a period early in development before Yang was replaced by Chun-Li as the resident Chinese representative. Also an unused stage select graphic of (Dictator) Bison.
  • Stuart Little 2 (Windows) has a couple of placeholder dialogue in the Sounds folder, one saying "Pick up the turbo booster and you'll go faster", and the other saying "You're an Ace!".
  • Sveerz - extracting the .SWF from the game's executable and decompiling it reveals unused logos of several game publishers and unused text. The final frame of the .SWF is a button test.
  • Temple of Elemental Evil: A Classic Greyhawk Adventure: being a Troika game, a number of things got cut in the rush to market on top of general buginess. Examples include the children of Hommlet and the Snake Pit in Nulb. These are restored in the "Circle of 8" mod series.
  • Terrordrome - not finished yet, but demos (v2.5, 2.6, 2.7, and 2.8 as of October 2012) can be found on sites such as Mediafire with differences. Official site here.
  • The Kakuro Code may have unused graphics and text.
  • Tintin: Destination Adventure has a debug mode enabled through game.ini, as seen here.
  • Tobe's Vertical Adventure has unused enemies and test levels.
  • Touhou Kaeidzuka ~ Phantasmagoria of Flower View has MIDI files leftover from the demo, but can't be played because the option is disabled.
  • Trial version of Touhou Youyoumu ~ Perfect Cherry Blossom has version differences.
  • Touhou Shinpiroku ~ Urban Legend in Limbo has unused graphics. Namely, silhouettes of Sumireko that are in a rather peculiar-named folder. The PS4 version may have some stuff too.
  • Tower Unite had a test map for the Virus game mode and another test map for items but both have been removed.
  • Tunnel Blaster has - as this video explains - some debugging capabilities and some leftover content. Also a small pic of the game designer in the files.
  • Tux of Math Command has lots of major version differences.
  • Unbirth, an unreleased game by Frictional Games that was still in the alpha stage from 2001 to 2002, seems to have interesting things. Available to download here, since it's no longer downladable on Frictional Games's site.
  • The human faction is used in Universe at War: Earth Assault has a great deal of content cut considering you use them for a total of five minutes for one mission.
  • Unreal Tournament 2004
    • There are a shitload of unused models from a very early Gears of War, back when it was called Unreal Warfare. Models, textures, propaganda poster textures showing early COG designs, you name it; it's there. All of them are viewable in the editor, so it should be easy.
    • An unused Onslaught ladder for SP exists. Check it out and see what levels are in it and how playable it is.
  • Urban Chaos has a fair amount of unused content, such as unused levels and unused modes.
  • Virtua Tennis 3 contains the Power Smash 3 opening video, but the Windows version wasn't released in Japan.
  • Wing Commander: Prophecy also has a debug mode.
  • Worms 3D has a couple of weapons that only appear in some versions, or don't appear in any version or... or something like that. Examples include the Ming Vase, Concrete Donkey, and Mega Mine.
  • Wonder Boy: The Dragon's Trap -- Edit/debug tools
  • WWE 2K15; there is a lot of unused content in the game.
    • There's a file called GM.pac, which might contain the code for the "GM Mode" featured in SvR 2006 to SvR 2008.
    • Some functionality exists for mixed-gender matches.
    • A few features were removed in this game; they probably still exist in the code somewhere.
  • WWF With Authority! was later updated as WWE With Authority! in 2002 and has various revisional differences.
  • Zombie Shooter 2 has the same cut content as in AS2, except the LIBERT pistol is finally found in-game. The game promised a chainsaw before release, incomplete weapon found in files, it is extremely glitchy. Very early copies of the game had you rescue your wife even as a female hero, patched out in later releases so female heroes rescue their husband.
  • Digimon Masters Online has some undocumented unused Digimon such as Labramon, Troopmon, Veggiemon, etc. and some Korean-server exclusive Digimon and areas examples such as MadLeomon Armed Mode/Final Mode and the Green Zone.
  • Gothic 2 has a lot of unused animations from the first game, unused spell and at least one unused response (about Lothar's excuses in 3 part).

Xbox

  • Kingdom Under Fire: The Crusaders has an early debug build that predates the final by one year.
  • Phantom Dust has a debug menu, accessed by renaming mainmenu_en.ssb to mainmen_en.ssb and menu1_en.ssb to mainmenu_en.ssb. Here's the source for this info.
  • ToeJam & Earl III: Mission to Earth had DLC support, but since the original Xbox's Xbox Live support is long gone, said DLC should be documented. Also, the game itself has two unused cinematics:
    • CaptureTest.sfd, a short gameplay clip of ToeJam running back and forth.
    • opening.sfd, an early version of the startup video. It is missing all of the logos sans the title logo, and the title logo uses the font of the first two games and is missing the "Mission to Earth" subtitle.

Xbox 360

  • These games have known, available prototypes with varying degrees of completion and debugging features aplenty:
  • Lumines LIVE! has graphical leftovers for skins Shinin', Shake Ya Body, I hear the music in my Soul and Lights in the Booster Pack DLC. There's also plenty of unused sounds.
  • Motorcycle Club also has a debug menu.
  • There are three different demos of Saints Row, with some minor differences including when the Third Street Saints originally wore green.
  • The Outfit had some developer photos used through development, which might still be in the game. Info here.
  • Resident Evil: Racoon City has a debug menu too.
  • Wheel of Fortune has a ton of unused voiceovers that likely also apply to the 2012 PS3 version (due to THQ's bankruptcy in December 2012, these are unlikely to be used in DLC).
    • Puzzle categories that are rare (Headline; Fictional Family shortly before it was merged with Fictional Character{s} into simply "Character{s}"), haven't been on the show in years (Best Seller; What Are We Making?), or never existed on the show (Classic Rock; Where Are We Going?). Among these are eight former categories well known for offering cash bonuses, including Next Line Please, Where Are We?, Who Is It?, and Slogan. It should be noted that the categories present in the game are taken directly from the show's official category list, given to contestants...which is clearly outdated.
    • Variations on "Sorry. All the consonants are gone and no one solved it. That money will go unclaimed." This is used in the Wii U version if everyone has less than $250 and cannot solve the puzzle, though.
    • Wheel dollar values that either don't exist ($475; $4,000; $10,000) or have not been on the show in decades ($275; $2,000).
    • Intro voiceovers of "Something seems strange. Have we been here before?" and "Well, now this brings back some memories.", labeled PAT_BANTER_INTRO_RETRO. (These might be used in the "1980s set" DLC, though.)
    • All of the above sound files are Pat's. Vanna's sound files contain explanations for a minigame called "Pick One", and mentions both Circle Pads and Analog Sticks; this may indicate that a 3DS version was in the works at some point.

Xbox One

  • Rare Replay has a massive amount of Revisional Differences for pretty much everything Pre-Grabbed by the Ghoulies. Mostly to remove mentions of whoever initially published the games. It would probably be best to hold off on this until it's actually possible to dump Xbox One games though.

Windows Phone 7

Windows CE

NEC

PC-88

PC-98

TurboGrafx-16

  • Cratermaze has regional differences (it's a Doraemon game in Japan).
  • Devil's Crush - is sound 40 ever used?
    • Alien Crush, Cyber Dodge, Cyber Knight, Xevious: Fardraut Densetsu - do they have this sound?
  • Lady Sword has a hidden developer diary in the script. The translation for it is in the readme for the translation hack.

TurboGrafx-CD

Nintendo

NES

  • Do any of the following have debug modes? This follows from my (andlabs') observation that early Now Production games (at least on the NES and Genesis) all have debug functionality left in:
  • Lots of released prototypes from Lost Levels
  • Athena - The ROM in the NES ROM archives included in the 2020-07-24 Nintendo leaks doesn't match what is on the cart. Also, minor regional differences and possible unused graphics.
  • Armadillo has a special game mode (called "Stone Armadillo" mode, which apparently slightly adjusts physics, palettes, and other things) that can only be accessed when used with the rare "Famicom Battle Box" accessory. The extra menus that can be accessed with the accessory installed should also probably be mentioned on the wiki, as well.
  • Family Trainer: Rairai Kyonsees - early prototype has a different fullscreen picture of the girl, which was uglily redrawn in the final version.
  • Hello Kitty no Ohanabatake - unused demo recorder/player containing recorded demos for levels 0, 3, and 12, which are totally incompatible with the final versions of the levels (or the level numbers themselves were changed).
  • Jangou a lot of code duplicate from early revision, including graphics, check if there is something different
  • NES Open Tournament Golf is known as Mario Open Golf in Japan and has lots of differences.
  • Radac Tailor-Made - The ROM in the NES ROM archives included in the 2020-07-24 doesn't match what is on the cart (or at least doesn't match the dump of unknown origin that can be found on the web)
  • Roger Clemens' MVP Baseball - The ROM in the NES ROM archives included in the 2020-07-24 doesn't match what is on the cart

NES (Unlicensed)

Game Boy (Color)

Game Boy (Color) (Unlicensed)

  • Harry Potter 3 has graphics for a...clown?
  • Pokemon Jade crashes after the first level, leaving almost the entire game unused. There might be leftovers from Sonic Adventure 7.
  • Pokemon: Mewtwo Strikes Back Post about possible beta material that Makon Soft / Yong Yong would have probably left in with (Although, this may not have much possible purpose in with the Li Cheng ROM, with them possibly taking out (unused) stuff, keeping from their programming fix to work.) Also, post about the intro differences, between DMG and CGB/GBC. In the DMG intro, Makon Soft / Yong Yong (probably) stole several frames of the intro, from Pocket Monster (SNES), however, in the GBC intro, like every Pokemon game of theirs, except Pokemon Adventure, they, of course, use pictures from the anime. The user, XanverKun, posts a YouTube video of the Li Cheng cart about the DMG intro. It's probably assumed that even probably the original Makon Soft / Yong Yong version has this too, with the intro. However, no proof. But most likely, it probably does, since Li Cheng barely probably would remove anything from the ROM, in their revision ROMs. I, Chowdit1, will probably remake the video in better quality. Also, as a side note, Li Cheng translated the game's name (in Chinese Simplified), as "Digimon (Digital Baby) {Taiwanese name for Digimon} [Shu-Ma Bao-Bei]: Mewtwo (Super (or 'Surpassable') Mew Mew) [Chao Meng-Meng] Strikes Back [Fanji Zhan]. So, it's exceptionally correct, but except for the series name.
  • Shui Hu Shen Shou has menu icons leftover from Pokemon Gold and Silver
  • Terrifying 9.11 apparently includes an unused Metal Slug logo (the game is an unlicensed, 9/11 themed port of Metal Slug for Neo Geo).
  • Thunder Blast Man has a few sprites leftover from Rocman X Gold

SNES

English games
  1. Bust-A-Move (SNES)
  2. Final Fight 3
  3. Final Fight Guy
  4. Hebereke's Popoitto
  5. Lufia II: Rise of the Sinistrals
  6. Marvel Super Heroes in War of the Gems
  7. Mega Man 7
  8. Mega Man's Soccer
  9. Operation Thunderbolt (SNES)
  10. Prehistorik Man (SNES)
  11. Space Invaders (SNES)
  12. Sterling Sharpe: End 2 End
  13. Super Bases Loaded 3: License to Steal
  14. Tetris 2 (SNES)
  15. The Great Circus Mystery Starring Mickey & Minnie (SNES)
  16. The Ignition Factor
  17. X-Men: Mutant Apocalypse
Japanese games
  1. ALBERT ODYSSEY 2 Evil God's fetal movement
  2. Bastard BLUES Showdown! Shitenno, Tokyo
  3. Battle Tycoon
  4. Big Lol Life Theater Zukoke Salaryman
  5. CHAOS SEED Feng Shui Corridor
  6. Daruma Dojo
  7. Deadly Pachinko Collection
  8. Dee-sama Appare best
  9. Demon's Blazon Makaimura Coat of Arms
  10. Dezaemon
  11. Energy Breaker
  12. Estpolis Ⅱ
  13. Final Fight TOUGH
  14. Goofy and Max's Great Adventure on Pirate Island
  15. Great LOL Life Theater Oedo Diary
  16. Haberei
  17. HAT TRICK HERO 2
  18. Honke SANKYO FEVER 2 real machine simulation
  19. Honke SANKYO FEVER real machine simulation
  20. Honke SANKYO FEVER real machine simulation 3
  21. Keiji Hana-Beyond the Cloud-
  22. Kirby Bowl
  23. Kirby's glitter
  24. LADY STALKER THE APOCALYPSE ENGINE
  25. Mario Super Picross
  26. MARVEL SUPER HEROES WAR OF THE GEMS
  27. Mickey and Donald Magical Adventure 3
  28. Mickey and Minnie Magical Adventure 2
  29. MOTHER 2 Gig's Counterattack
  30. New Japan Pro-Wrestling Official '94 BATTLEFIELD Fighting Dream
  31. Ochan's drawing logic
  32. Orthodox Go Gosei
  33. Panel ACTION PUZZLE GAME
  34. P-Man
  35. Popoitte
  36. PUZZLE BOBBLE
  37. Rie Saibara This Well
  38. ROCKMAN 7 Destined Showdown!
  39. ROCKMAN'S SOCCER
  40. RUIN ARM
  41. SAMURAI SPIRITS
  42. Seijumaden BEASTS & BLADES
  43. Shanghai Ⅲ
  44. Shanghai Great Wall The Great Wall
  45. Shonen Ninja Sasuke
  46. STARDUST SUPLEX
  47. SUPER BOMBLISS
  48. Super Magic Continent WOZZ
  49. Super Ninja-kun
  50. Super Rugby
  51. SUPER TETRIS 2 + BOMBLISS Limited Edition
  52. SUPER TETRIS 3
  53. SUPER Ultimate Harikiri Stadium 2
  54. SUPER, burn! !! Professional baseball
  55. Tactics Ogre
  56. Tame fortress
  57. TETRIS FLASH
  58. The Flintstones: The Treasure of Sierra Madrock
  59. WILD GUNS
  60. Would you like a delicious puzzle

SNES (Unlicensed)

  • There are several unlicensed SNES games with interesting anti-piracy features.

Nintendo 64

  • The 64DD Mario Artist games have debug features, or at least debug leftovers.
  • There's partial source code for a Mortal Kombat game in the 2020-07-25 Nintendo leak.
  • All-Star Baseball '99 has debug text and a bunch of bin/data file paths scattered in the ROM, but mostly near the beginning, as well as a file/reference to CODE.BIN. (I'm not 100% sure if the later part would qualify for the wiki but I thought I'd note it anyway)
  • WCW vs. nWo: World Tour was later released in Japan as Virtual Pro Wrestling 64 and has differences from its American counterpart.

Game Boy Advance

GameCube

Wii

  • Arc Rise Fantasia
    • Ten(!) test rooms that need to be file swapped to work.
    • The US version actually added more voice acting for battles.
  • Art of Balance (WiiWare) has a few files/folders with 'test' and 'debug' in the name.
  • Blaster Master: Overdrive (WiiWare) has various "test" files in the "sideview" directory.
  • Castlevania Judgement
    • Initialization test text.
    • Leftover menu/HUD graphics from Naruto: Clash of the Ninja - Revolution.
    • Early-stage copies.
    • Placeholder graphics.
  • The Conduit has a test room only accessible through private online multiplayer and cheat devices, as well as an early version of Sanctum, and a debug mode. Also, leftovers from the scrapped LAN multiplayer exist and can be undummied out.
  • Doc Louis's Punch-Out!! has music for when Doc Louis is knocked down, which goes unused since he instantly gets knocked out after losing all of his health.
  • Final Fantasy Fables: Chocobo's Dungeon has an early version of Shirma, complete with a load of animations.
  • Jett Rocket has early/testing levels and a crash screen.
  • Line Attack Heroes (WiiWare) has unused config files referencing the scrapped US release and the E3 demo (which wasn't WiiWare), internal names and a symbol map.
  • Mario & Sonic at the Olympic Winter Games has several unused/unplayable characters.
  • Mario Super Sluggers appears to have an unused file named bgm_captain.
  • Monster Hunter Tri has many unused icons.
  • Nicktoons MLB has Rocko from Rocko's Modern Life as an unused character. All of his data is still there and may still be playable if hacked in.
  • The Penguins of Madagascar: Dr. Blowhole Returns has many test levels.
  • Pokemon Rumble has text and data for a debug menu.
  • PokePark2: Wonders Beyond has an unused chase remix theme. It also has a number of debug rooms and associated level parameter files, possibly allowing them to be loaded in-game.
  • Sonic and the Secret Rings has some test files and some test videos (maybe not unused).
  • Tales of Graces has dummied-out artes: Sophie's Final Fury and Blast Heart, and Cheria's Innocent Shine and Meteor Storm. Either playable or sound-only, there is a huge amount of them. There also seems to have traces of a certain "DEVD," thought to be a missing character (much like PAT in Vesperia). It has also revisional differences.
  • Tony Hawk's Proving Ground has files for a test level and a test video and various remnants from the Xbox 360 / PS3 version.
  • WarioWare: D.I.Y. Showcase has two different games in the Japanese version. "Punch-Out!!" was originally "Card Hero", and "Kid Icarus" was originally "Freshly-Picked Tingle".
  • Wii Chess has regional differences.
  • Wreck-It Ralph has some test rooms. Check if they work.
  • A small number of demo discs (very small, almost definitely under ten) were produced. Some of these are "Activision Exclusive Playable Demo Disc" with demos of Big League Sports, Dancing with Stars: Get Your Dance On, Madagascar: Escape 2 Africa, Monkey Mischief, and Shrek's Carnival Craze; individual discs for Boom Blox, Help Wanted: 50 Wacky Jobs, Monster Hunter Tri, Muramasa: The Demon Blade, Rooms: The Main Building, Epic Mickey and Sonic and the Secret Rings, more than one Skyward Sword.
  • Dr. Mario Online Rx has prototypes on the Wii CDN (title ID HDM* instead of the final's WDM*)
  • Tokyo Friend Park II Ketteiban: Minna de Chousen! Taikan Attraction supposedly has source code on the disc

DS(i)

(New) 3DS

Wii U

  • A way to disable sleep mode is on the external hard drive.
  • Miiverse had debug features. The way to access them may have been removed by updating the HTML or by a system update. But there are leftovers of some sort. Not sure if this should go on "Wii U" page or "Miiverse (Wii U)" page.
  • Are the Wii software rerelease ISOs different in any way?
  • GBA Virtual Console Games have code leftover from other projects and Adobe Photoshop. (source: ajd4096)
  • Some games have internal names (source: Random Talking Bush)
  • To be discussed: updates for download-only games.
  • Jeopardy! and Wheel of Fortune very likely have a plethora of unused images and such for the online gameplay features they trumpeted in promos and even on the boxes but never actually delivered. Also, given that these were THQ's last games before filing for bankruptcy a few days later (probably why they suggested the consumer pay $20 more for inferior products), they might have some other unused stuff that may overlap with those of the Xbox 360 and PS3 versions.
  • NES Remix and its sequel (naturally) have Famicom-related regional differences. And the emulations are likely to have differences as Virtual Console games do.

Nintendo Switch

Sega

Master System

  • The Sega Master System BIOS has a prototype.
  • Some early Master System games have an unused logo at the end of the ROM matching the BIOS prototype.
  • Action Fighter has revisional differences.
  • Alex Kidd in Shinobi World - Maxim from SMS Power discovered the unused boss while Glitch found the Shinobi Kidd sprite and Mari-Oh portrait. Also an unused Round 5 icon and an unused boss portrait.
  • Double Hawk, Dynamite Dux, Rambo III and Summer Games have unused FM soundtracks regardless of the region.
  • ESWAT has 3 prototypes, each with changes. Revision 0 and Revision 1 also have changes such as difficulty adjustment and removing the Arrest text. Paul Baker documented these
  • Olympic Gold (Sega Master System) has some regional differences
  • Cyborg Hunter has regional differences because in Japan it was a licensed game called Borgman.
  • Rambo: First Blood Part 2 is known as Secret Commando in Europe and Ashura in Japan has regional differences including sprites of the playable characters, the US version having the Rambo theme, the cutscenes and the title.
  • Slap Shot has a prototype being called Slap Shoot.
  • Super Off Road has a prototype with credits
  • Two remaining Sapo Xule games are Kung Fu Kid and Astro Warrior, the latter is based on the Hang-On/Astro Warrior ROM version. There are also the other Brazilian games that got altered for licenses such as the Wonder Boy/Monster World series being Monica's Gang.
  • Many sports games have regional differences on the Master System; these include Walter Payton Football (American Pro Football with the European version adding an intro), Reggie Jackson Baseball (Europe: American Baseball changing the intro graphics), Great Baseball is known as The Pro Yakyuu Pennant Race in Japan and is licensed, James "Buster" Douglas Knockout Boxing has a different title screen and the player name for the European/Brazilian version called Heavyweight Champ. Oh and that Brazilian version of California Games where the events are cut down. There is also a possibility that Nekkyuu Koushien is the earlier Japanese version of Reggie Jackson Baseball however code comparison is needed.
  • There are quite a few games with FM soundtracks that were never released in Japan (the only region where the Master System includes the YM2413 FM chip), thus rendering those soundtracks unused. List of FM-enabled games and further information can be found here and here.

Genesis

  • Lots of Genesis games in general, thanks to drx.
  • Aquatic Games might have some regional differences. When played at 50hz in the 100 Metre Splash, Pond makes some splashes on the water, as well as the accompanying sounds when he runs fast while when played at 60hz they do not. This is most likely a bug in the game since the US and European versions are on the same cart.
  • Barbie Super Model has a prototype with multiple differences. (See nintendoplayer.com for details.)
  • Beastball has text for a "test options" menu, can this be enabled?
  • Championship Bowling has some regional differences with the big one being that the portraits in the Japanese version (Boogie Woogie Bowling) are different.
  • James Pond: Underwater Agent has two unused themes.
  • Micro Machines 2: Turbo Tournament has unused tracks.
  • Prince of Persia has some unused songs and some regional differences.
  • Shadow of the Beast has some regional differences that include a lot of changed sprites, added sound test, and removal of the US/Europe ending.
  • Shadowrun has a debug menu and several prototypes.
  • andlabs's "so I don't forget" list of things to look into:
    • There's that unused item art in Madou Monogatari I that I found long ago but without knowing what the item palette(s) is it looks like a pile of shit (literally) :|
    • Darius II/Sagaia - GameFAQs doesn't seem to have a clear idea of what all the cheat codes are? Super Hard Mode triggers a string SPECIAL MODE, for instance... Also, are zones Z1 and Z2 used? Also this
    • Chou Kyuukai Miracle Nine appears to have a debug menu of sorts:
00038A:60     (bypass checksum)
FFED84:30     (set game mode)
0065B6:4E71   (nop out rts blocking the menu)
Not sure if it is used or not or if it has an effect as pressing start after disabling the RAM code just brings you back to the menu, so I have to see if it's supposed to come from elsewhere by disassembling all the game's code :/
    • Feng Kuang Tao Hua Yuan has a block of either unassembled helper code or compiler assembly output, not sure which... but the present dump is not from the original cart, but from a mainland China(?) "rerelease" so I'll wait until we can get an authentic dump
    • Simple sound test codes... documented in the manual or not?
      • Mahjong Cop Ryuu - A+Start on the title screen
    • Crack Down - Japanese characters loaded in title screen? there don't seem to be any in the intro or on the title screen... or anywhere in the game...
    • Rugby World Cup 95 appears to have each of its functions suffixed by the function's name (like a symbol table but scattered throughout the ROM). Also "Dave Was Here!"
      • There's a flag that if set to nonzero, the game loop will enter an endless loop that cycles through each of the big-board animations that can show up; check at $13DA and loop immediately afterward, checks -$6EA1(a5) where a5 is $69C (yeah it's one of those games)
      • Turns out many, if not all, of the Extended Play Productions games have these symbol setups...
    • Hellfire: "M2612 SOUND REAUEST TABLE "/"ERRORS=0000"/" 0221 END"
bah it's located in the sound driver
      • Also
pietro@pietro-laptop:~/ida_linux$ bgrep '0D 1E 0D 0E' Hellfire*
Hellfire (Europe).md: 000120f5
Hellfire (USA).md: 000120ff
for the hard ending text... but the EU version wasn't Seismic...
While investigating the M2612 thing:
00012BAE  67 76 30 3C 00 E1 22 3C  00 03 E0 00 34 3C 04 06
00012BBE  4E B9 00 00 5F 84 70 02  22 3C 00 03 69 A0 34 3C
00012BCE  03 F2 4E B9 00 00 5F 84  30 3C 24 06 32 3C 23 9A
00012BDE  74 0E 76 0E 4E B9 00 00  65 5C 23 FC 00 01 25 6C
00012BEE  00 FF 00 9A 4E B9 00 00  60 70 30 3C 00 10 22 3C
00012BFE  00 01 25 6C 34 3C 00 40  4E B9 00 00 5F 10 30 3C
this is nonsense for Hellfire (begins with a conditional branch to noncode, calls the middle of functions at non-entry points, and the last call jumps inside an opcode)
...and is only in Hellfire (only in JP version)? something's not right here
not in arcade versions
    • Pac-Attack: are the credits immediately after puzzle mode?
    • shobiz found a lot of stuff in Quackshot
    • Mega SWIV: word $80 is used as a flag to do something when you get hit by a bullet, but what?
    • Rainbow Islands Extra has a title screen cheat code: Up B Down Left C A A* B** C***. The last three buttons are so marked because you can stop at any one of those and only get the effects of the buttons you pressed. I *think* A makes you faster? I don't know... The code is checked on the main menu too. None of them appear to be related to infinite continues.
      • B button: [00:18] <Mister_Argent> Hey, i just tried that RI cheat code. I started off with Double Rainbows, but I don't know if that's normal for extra mode or not.
    • King Colossus: down up up down right left right left on the game over screen continues -- is this in the manual? even if it is, an additional right right is at the end of the code, but the game stops after eight button presses
    • Mega lo Mania/Tyrants: Fight Through Time:
; not the actual addresses as the data is copied to RAM
[03:06] <andlabs> seg001:00FF0162 aSelect:        dc.b 'select',0
[03:06] <andlabs> seg001:00FF0169                 dc.b '-----------------',0
[03:06] <andlabs> seg001:00FF017B aToPlaceIn:     dc.b 'to place in',0
[03:06] <andlabs> seg001:00FF0187 aBuildingPorts: dc.b 'building ports',0
...
[03:07] <Flygon> I don't recognize the term 'building ports', though
[03:08] <andlabs> I wouldn't know
[03:08] <Flygon> Unused string?
[03:08] <andlabs> it's in the list
[03:08] <Flygon> Indeed
[03:08] <Flygon> Hmm
[03:08] <andlabs> so unless the specific index to get to that string is never loaded, then
[03:09] <andlabs> I would need to find out which bytes are loaded into the code to look up strings
[03:09] * Flygon should consider creating a Mega-lo-Mania fan-forum x3
[03:09] <andlabs> if the one that indexes that port string is never used... that string is unused and we have a mystery
[03:09] <Flygon> Indeed
[03:09] <Flygon> Good thing only one of the developers are dead...
[03:09] <Flygon> They appear quite cooperative to fan questions
[03:10] <andlabs> http://www.gamefaqs.com/genesis/586569-tyrants/faqs/38544 check the author
FAQ has no mention of ports...
      • The Japanese version has bits and pieces of SNASM68K left in it
      • The later European version has, in its ROM header, a serial number field that indicates a CD version was in development? I need to check Sega CD headers
    • Mary Shelley's Frankenstein has an actual symbol table? (as opposed to Rugby World Cup 95)
    • Mega Bomberman - word at $2D8 in US version - if changed to a nonzero value, the CRAM is altered on every main loop cycle to show something (CPU usage debug?)
    • Socket
[22:54] <GenesisFan64> don't forget the unused song, B G M 19
also various Unknown labels in GF64's disassembly
    • Double Clutch has a cheat code it checks for right at startup! ...but my patch codes to hang the game when it checks the variable it sets when the cheat code is activated doesn't seem to do anything... does it happen when not in a race? I would need to beat a race to find out...
    • Find FRUITMEISTER I in an earlier Eurocom Genesis game (have t wait for SeanieB to finish changing Sega Retro hard drives before I can get a list)
No luck finding it in The Jungle Book (Genesis), all pause cheats are accounted for. TODO: check RNC (compressed) graphics --JLukas 22:28, 30 April 2013 (EDT)

Genesis (Unlicensed)

Game Gear

Pico

Saturn

  • The Sega Saturn ports of Alone in the Dark and its sequel have debug menus, accessed on the main menu by pressing L, R, L, R, Start.
  • Andretti Racing has a rather fantastic hidden menu that allows you to adjust your fuel amount, number of laps, enemy AI and even the centrifugal force to make slipstreaming easier or trigger incredible crashes where your car flips as if there is no gravity!
  • Battle Arena Toshinden URA, and D-Xhird have debug modes that can be accessed without Action Replay codes. The D-Xhird debug code is accessed during the Takara logo by pressing X, Y, Z, Left, Down/Left.
  • Daytona USA Championship Circuit Edition has regional and revisional differences.
  • Final Fight Revenge contains English ending text and title screen copyright info, except the Sega Saturn port was released only in Japan. It is suggested the former is controlled by the system language option. http://rq87.flyingomelette.com/FF/F/R/qa.html
  • NASCAR '96 has a debug menu that lets you alter many aspects of the game and play in Wireframe mode.
  • Sega Rally has regional differences, one of them the US/Brazilian version is missing a mountain graphic compared to the Japanese/European versions. There is also a revisional difference in the form of Sega Rally Plus/Net Link Edition.
  • Spot Goes to Hollywood has a level select.
  • Titan Wars has a "secret" AVI file.
  • Wipeout (aka Wipeout 2097) also has a debug mode which lets you play in Wireframe mode, as well as many other cool alterations.

Dreamcast

Arcade/Sega Nu

Sony

PlayStation

PlayStation 2

PlayStation 3

PlayStation 4

PlayStation Portable

PlayStation Vita

SNK

Neo Geo

  • Plenty of debug modes to document here.
  • Bust-A-Move - Unused graphics
  • The King of Fighters '94 (Neo Geo) - When Rugal is removing is its jacket in his intro animation it's possible to remove the jacket sprite layer early on to see a smiley yellow tattoo on Rugal's back for the sprite used only at that moment; maybe not worth noting here, but if you use dipswitch settings to control jacket Rugal and hold the ABC button to charge power he'll turn invisible because the CPU never uses that for that particular version of Rugal.
  • Ghost Pilots - Save file message
  • andlabs' to-do list:
    • General TODO: look for any Neo Geo games that have a custom eye-catcher but don't use it

Misc.

Adobe Flash

Arcade

  • Many CPS2 games have ROM flags that set it to the location test/debugging mode (see here). If it is worthy of here, document them.
  • All the Parodius ports are usually different from each other. Parodius Da!: Shinwa Kara o Owarai e has the most noticeable cuts, with two whole levels disappearing in various ports. I can't remember which game, but Konami chose to change the BGM of a level from "That's The Way I Like It" to avoid copyright.
    • The music change was in Jikkyou Oshaberi Parodius. It was left intact in the console versions but changed in the PSP version to "Brilliant 2U" from DDR.
  • A Japanese hacker named Wayder has relevant cheats for quite a few Arcade games.
  • Ryoga Masaki also has a giant list of Taito games which all share the same test code.
  • Several Konami games have regional differences, including Metamorphic Force and Lightning Fighters.
  • Aero Fighters 2 - Unused bosses (see comments)
  • Alien Syndrome has some unused music.
  • Batrider has a debug menu.
  • Big Striker has placeholder sprites.
  • Block Block's regional changes include stage order and even the entire soundtrack.
  • Burning Force Unused English translation, etc.
  • Center Court, a prototype of Passing Shot, has numerous differences.
  • Crazy Climber has regional differences. Set 2 (which was recently dumped) also contains different music.
  • Dangun Feveron supposedly has several unused music tracks.
  • Daytona Championship USA has a debug menu.
  • Daytona USA 2: Battle on the Edge has the Hornet Classic from Power Edition hidden... featuring a hood scoop! Video. There's also the "You can use the secret car" sound in the sound test - related to this?
  • Drift Out has two unused songs in the sound test. The sound test also explicitly says that the songs in question aren't used. Also, there are Taito logos, according to MAME's F4 menu.
    • IDs: 0x18, 0x1a, 0x25
  • Enduro Racer has an unused song in the YM2151 version but has two unused songs in the YM2203 version.
  • Hard Drivin' and Race Drivin' both have regional/revisional differences in Hard/Race Drivin'. They go compact (lower resolution, different font, press shifter to start), British (drive on the left, traffic on the right), and for Race Drivin' Panorama where there is an extra track plus the game uses 3 screens. There are also multiple revisions but requires someone to understand the code changes.
  • Ketsui: Kizuna Jigoku Tachi has a few unused announcer voices - 'Just a couple more shots!', 'Please continue!', 'Game Over.'.
  • Knuckle Bash has an unused ditty and some regional differences.
  • Magical Cat Adventure / Catt has different revisions (languages?) with different content/added cutscenes
  • The Metal Slug series - so much stuff here.
  • Mug Smashers has some unused stuff such as Jump and Destroy signs and possible unreleased Spanish version distributor graphics.
  • Omega Fighter has some debugging stuff, which appears to be accessible with a glitch.
  • Pang 3 has some possibly unused Buster Bros. 3 graphics. Buster Bros. 3 wasn't released in the arcades in the US however it was released in the Buster Bros. Collection on the PS1/PSP as Buster Buddies. There might also be a way to change the region, and if there is, document that.
  • Power Card has threatening text to pirates in German[12]
  • Quartet has two unused tracks.
  • Rollergames has a couple of unused tracks.
  • Samurai Shodown V has extensive regional changes - from cutscenes to proper endings.
  • Second Earth Gratia has an unused song.
  • Shackled (JP Breywood)
    • A few interesting differences between versions
    • US version has a hidden path that leads to the ending in the first room.
  • Star Gladiator contains a couple unused (test?) characters.
  • Sunset Riders Has unused graphics for a woman meant for the bonus stages, and possibly more stuff too.
  • The Combatribes has 3 unused jingles.
  • Three Wonders has a good number of unused graphics.
  • Time Crisis has an unused song?
  • Total Carnage has an ending screen that never appears because of a bug.
  • Trog has a prototype that plays very differently from the final game.
  • Typhoon (A-Jax) has version differences.
  • World Heroes Perfect has unused music...and what looks like a scene viewer.
    • ID: 0x13 Go to Front
  • X-Men vs. Street Fighter contains an unused theme present on the OST and within the game's test menu. Additionally, having both players select Apocalypse and then ending the fight in a draw results in "X-MEN VS STREET FIGHTER COMING SOON" message during the continue screen. Apocalypse himself has an unused (and useless) some sort of fireball attack.
  • Wangan Midnight Maximum Tune 5 (and DX/DX+ revisions) has some cars available only in Japan, most of them through the Maxi.net Premium service (shut down now due to WMMT6 launch); DX+ made Honda S2000 Type S available for players who attempted to qualify for 2018 Wangan Midnight Maximum Tune World Championships, while it is possible to see the newer HiAce from searching for a space as a ghost name, and the Mini Cooper Countryman is solely there for Japan Challenge compatibility. Then there's the mythical Honda S660...
  • andlabs' list:
    • Borench contains leftover copyright text from Bloxeed; need to see if it contains the full code for the screen
      • Dynamite Dux might have a different one: "OBJECT COLOR BANK OVER"? "OBJECT COLOR ENTRY OVER"?
    • Wrestle War has an anti-piracy message in plaintext which is probably used but ("COPIED AND SOLD WITHOUT"...)
    • Dynamite Dux (again): "SELECT COURSE BY LEVER"?
    • Viewpoint has lots of debugging stuff? "H-POS %04x Z %04x" "V-POS %04x X %04x" "WALL-L %04x R %04x" "SHILD %02d" "KEY RECORD FULL"?
    • Crack Down has a sound driver test? "Sound Note Oct Level 0123456789ABCDEF"
    • Shadow Dancer has a round select? "SELECT THE SCENE"/"ROUND STAGE"/"COUNT UP DOWN BY SHOT JUMP BUTTON"/"START BY MAGIC BUTTON"
    • The Irritating Maze: "You are died ! Time Up !! " ?
      • "IDAXAN"? (multiple) This is probably just an opcode but who knows
      • " DENGEKI IRA-IRA BOU"... isn't it Denryu Ira-Ira Bou
      • OH BUT THERE ARE SOUND TEST STRINGS! Since the game never had a home port and the MVS service mode doesn't have a sound test...
      • "COMING SOON"? (multiple)
      • "SILENT@MODE"? "POSITION CHECK ROUTIN"? repeated Stage Select/Course Select strings for when starting a game?
    • Tetris (Sega) and Flash Point - "OVERFLOW" in the RAM/ROM checks?
      • Flash Point:
NORMAL OJAMA
        TETRIS TETRIS
TIME
NORMAL  
ITEM USE
OJAMA   
    • Namco System 2 games (search for Now Production continues):
      • Assault uses " RIDDLE OF RUBY " as a startup check string... is this significant in any way? there is no game by that title...
    • Hebereke no Popoon: "END_OF_DATA_SECTION." and strings related to cutscenes and character names? and then " CHR TEST" near the beginning of the ROM where there is a copy of the test mode strings?
    • Peter Pack-Rat: in ROMs 146 and 147 (interleaved bytes), stored with the credits:
ALSO BROUGHT TO YOU BY:
MAMIE VAN DOREN, TWIGGIE,
THE EL PASO PHILHARMONIC,
MOTHER, Generic TV DINNERS,
YOUR LOCAL CHEVROLET BOTTLER,
GARRY TRUDEAU, BERKE BREATHED,
FRESH SNOW IN THE SIERRA NEVADAS,
BUT MOST IMPORTANT, MY COFFEE MAKER!
  • used?

BBC Micro

  • Gary Partis hid messages a lot in his games and only Psycastria is on the wiki so far. Some examples here.

BBS Door

Coleco Adam

  • Donkey Kong Jr. (Coleco Adam) has a couple of prototypes on Digital Data Pack as well as floppy, both of which have a Pie Factory stage not in the other versions, and especially not in the original arcade version. Video of this stage is here.

Game.com

Handheld LCD

  • According to the TVTropes page, there's some Dummied Out Tamagotchis on the Tamagotchi ROMs. Look into that, and also document the debug menus on some of the Tamagotchis.

HTML5

J2ME

Magnavox Odyssey2

Nokia N-Gage

Nuon

Panasonic JR-200U

Philips CD-i

Pinball

Plug & Play

Sharp X68000

  • Lots of Easter eggs in a lot of games (mostly developer messages, images, and sound test). How to access them can be found in Japanese cheat pages here.
  • Metal Sight apparently has at least one unused song; or at least that's what the description of MDX/System Sacom/Metal Sight/METAL02.MDX in mdxo_mxdrv_complete.ra_ seems to imply. The file doesn't work with either mxdrv or mdxplay... (TODO try the Windows-based players)
  • D-Return - the following in mdxo_mxdrv_complete.ra_ are marked unused:
Binary file ./NOP/D-Return/D_RET31.MDX matches
Binary file ./NOP/D-Return/D_RET35.MDX matches
Binary file ./NOP/D-Return/D_RET36.MDX matches
Binary file ./NOP/D-Return/D_RET37.MDX matches
Binary file ./NOP/D-Return/D_RET38.MDX matches
Binary file ./NOP/D-Return/D_RET34.MDX matches
Binary file ./NOP/D-Return/D_RET33.MDX matches
Binary file ./NOP/D-Return/D_RET32.MDX matches

Tiny Arcade

  • Tiny Arcade has a hidden diagnostics mode accessible by removing the jumper connection from the PCB which can be seen in this video.

TRS CoCo

WonderSwan Color

  • Final Fantasy has an unused naked bald guy in with the class select sprites, hinting at a possible use for that dude stored with the orb graphics in the original game.
  • Final Fantasy IV is where the enhanced variants of the unused graphics in Final Fantasy IV Advance originally came from. It might be worth looking into whether the debug features in that port originated in this version since they only cover the original game.

ZX Spectrum