Diablo (Windows)

Diablo
Developer: Blizzard North Publisher: Blizzard Entertainment Platform: Windows Released in US: 1996 (disputed) Released in EU: 1997 This game has unused areas. This game has a hidden developer message. This game has unused enemies. This game has unused objects. This game has unused graphics. This game has unused cinematics. This game has unused items. This game has unused abilities. This game has unused sounds. This game has unused text. This game has a development article This game has a prototype article This game has a bugs page

This page is loooong... Consider grouping related content into additional subpages to ease readability.

Diablo is basically Blizzard's second most famous action role-playing series, next to Warcraft, where instead of fighting orcs, you're essentially on a mythical quest to murder everyone's friendly neighborhood dark-lord.

Diablo was originally developed as a turn-based game by Condor Inc. Condor was later bought by Blizzard Entertainment and transformed into Blizzard North. As part of the arrangement, Diablo would have to include real-time combat instead of turn-based combat, and feature multiplayer. Blizzard was convinced that these two features were key after the success of Warcraft. It turns out that they were correct. David Brevik experimented with real-time combat by simply reducing the turn length to 0 seconds, and the rest is history.

Subpages

Development Info

Prototype Info

Bugs

Hellfire Unused content in the expansion. Now with more nuts!

Cut Quests Haha! They have you hunting worms now? What's next, leaf collecting? Picking up mushrooms?

Cut Monsters The sanctity of this place has been fouled.

NPCs

Tremain

Originally, the town of Tristram was going to feature a priest, Tremain, who would've guided you in the last few missions, only to have been killed by a cursed sword. It's clear that this character was cut fairly early on - he has a very incomplete set of dialogue that doesn't even include gossip about the other townsfolk. Graphics for this character exist in /towners/priest/priest8.cel, implying that he was either the eighth character developed or that there were eight different iterations of his graphics. His dialogue is in /sfx/towners, along with all the other townsfolk.

Graphics

File Name	Audio	Transcription	Notes
priest00.wav		All I can do now is pray for us all.	Most likely his greeting when you interact with him, just like with other characters.
priest01.wav		I seek a champion to undertake a serious duty and the people of this town speak well of your courage and skill. The Archbishop Lazarus, once King Leoric's most trusted advisor and a member of our order, has taken the path of evil. Not long ago, Lazarus lead a party of simple townsfolk into the labyrinth to find the king's missing son, Albrecht. Only a few of them escaped with their lives. Curse me for a fool! I should have suspected his veiled treachery then, for I have learned that it was Lazarus himself who kidnapped Leoric's son and has since hidden him within the labyrinth. I still don't understand why the Archbishop has turned to the darkness, or what his interest is in Albrecht. Unless...he means to sacrifice him at the full moon! That must be what he has planned! The survivors of his rescue party say that Lazarus was last seen in the deepest bowels of the labyrinth, some sixteen levels beneath the cathedral. You must hurry, and save the prince from the sacrificial blade of this demented fiend!	Lazarus is on the fifteenth level in the final game instead of the sixteenth (which has Diablo). Sacrificing the prince on the full moon could possibly be related to the Strange Map quest, which also involves a time limit based on celestial bodies. The existence of this line creates a paradox; if Tremain has been killed by Shadowfang, he shouldn't be able to give this quest. This could mean that either the story was slightly different before, or that Lazarus quest could either appear or not, instead of being mandatory. This is also could be simply an oversight that they fixed by giving this quest to Deckard Cain.
priest02.wav		Why do you delay? Time is of the essence! The prince and the people of this kingdom are counting on you!
priest03.wav		So, Lazarus has paid the price for his betrayal, and justice is served. For your services this day, I bestow this mace unto you. Its name is Lightforge, and it is the holiest of our order's artifacts. As I am the last of this order, I entrust it to you. May the light guide you.	Lightforge exists and can be found in the final game as a random unique item. Deckard Cain is also revealed to be the last member of an ancient order; perhaps this plot point was reused.
priest04.wav		This is terrible! Lazarus will surely burn in hell for his horrific deed. Although the boy you describe may not be our prince, I believe that Albrecht may yet be in danger. Whatever vile power lies beneath the ground has assuredly secured its foothold in our world. All I can do now is pray for us all.	This is possibly the "bad ending" if "Albrecht" is not saved in time.
priest05.wav		I have had a most disturbing experience that I must share with you, my friend. Earlier today, I was called upon to help one of the men that escaped from the labyrinth. He was deranged, violent, and kept lashing out at all of those who tried to calm him. I suspected that he was possessed by some sort of demonic entity, and so, began to drive the evil from within him. After many hours, I was able to exorcise a demon who called himself Fleshdoom, but the hellion fled into the labyrinth. You may think that I am mad, but after speaking with the man and battling with Fleshdoom, I believe that the labyrinth has somehow become a gateway to the underworld. As you descend deeper, you may find yourself upon the doorstep of hell itself. Finally, the man who was possessed retained memories of an ancient demon blade named Shadowfang. If you find the demon Fleshdoom, beware this foul sword. While I fear the dangers below grow even greater, you must find Fleshdoom and slay him. Bring the sword to me and I can destroy it. But do not wield it; for its power can corrupt absolutely.	This begins the Shadowfang/Fleshdoom quest.
priest06.wav		Fleshdoom's demise is a great good to the world, yet Shadowfang remains. It must be found and destroyed. Do not attempt to use the demon blade, champion. It will corrupt and madden any mortal who wields it. I alone can end its dark evil.	Presumably this would be used when talking to Tremain after killing Fleshdoom but while not possessing Shadowfang.
priest07.wav		Light be praised! You found the cursed demon blade. Only its destruction can ensure the safety of us all. Wait. What treachery is this? Ow! It burns! Hellfire, consuming me! You must take this to the Hellforge, and cast it in before...no!	Tremain dies after saying this line.

The other townsfolk have unused, voiced gossip lines about Tremain:

Speaker	Audio	Transcription	Notes
Adria		Faith is absolute belief in the unseen. The priest Tremain is from a holy order long asleep in this land. He keeps a promise and a charge issued ages ago and sustains a union with realms that even my vision cannot reach. He knows much, but not as much as he believes.
Deckard Cain		Tremain is an occasional visitor to our town, and seems to have little problem coming and going. It is strange how at times anyone that tries to leave Tristram is hunted down and slain by the cloaked rides, and at other times it is a simple matter to leave. I think that it is that uncertain fear that keeps some of us here. But we are glad for Tremain's bravery and luck in keeping some contact with the rest of the kingdom.
Farnham		I haven't ever see a priest around here. If I did I'd kick him right in the *BBBBUUURRRPPP* Can't even keep a church free of those Hell spawn - bastards. What good are they, those holy men? Liars! Liars!
Gillian		I really don't know much about the priest Tremain. He never visits the tavern, preferring to keep to the company of Pepin and Cain. Perhaps it is because they, too, have more scholarly pursuits.
Griswold		The priest Tremain. *Griswold Noise* He's a solitary fellow who has no time for most of us. He seems to prefer the company of Pepin or Cain. Ah, that's fine by me. I respect his passion and his commitment to his order, but I've no time for his prattling.
Ogden		The priest Tremain is a bit of a mystery. He certainly never stays here, and he often comes and goes to many of the nearby towns.
Pepin		His Holiness is a wondrous man of great knowledge and understanding. He has shown me many cures for rare and deadly diseases. He brings me books and reagents for my work whenever he can. But I fear that he may some day take on a task that is too great even for him.	This is foreshadowing a later event.
Wirt		Yeah, Tremain. He gets around, doesn't he? Or haven't you heard? My friends in some of the other towns say that he passes through. Picking up some books here, a pinch of bat claw there. Never seems to have the kind of problems most do getting in and out of Tristram, that's for sure.

Unused Walk Sequences

Walk sequences exist for Griswold, Gillian and Ogden in eight directions. All town NPCs are stationary in the final game, and these sequences go unused.

Filename	Character	Animation
towners/smith/smithw.cel	Griswold
towners/twnf/twnfw.cel	Ogden
towners/townwmn1/wmnw.cel	Gillian

Unused Player Dialogue

Diablo is rare for having more unused dialogue for the player character than what's used. Specifically, out of the 326 lines of dialogue for the player character that are present, only 144 are used, leaving 182 unused.

The following table outlines all of the dialogue that is unused, and present for all characters. The line number corresponds to the file name. For example, line 02 corresponds to sfx/rogue/rogue02.wav, sfx/warrior/wario02.wav, and sfx/mage/mage02.wav, although the file names for the warrior may vary slightly as they don't follow a fixed convention.

Line #	Rogue	Sorceror	Warrior	Transcript	Notes
2				"Let this tome serve as your warning. This is a forbidden place. Return from whence you came, and your life will be spared. Horazon, master of the disciplines that summon and bind creatures to this plane, promises death to those who pass beyond the five pillars. You have been admonished."	Related to the Horazon's Sanctum quest.
3				"Then by binding the spirit to the crafted rock, it is given life." This sounds like a spell of some kind.	Probably related to the Horazon's Sanctum quest, given its proximity to other lines. Possibly would've given the player the Golem spell.
4				"The Creature of Flame, by Horazon." Hmm. Should be interesting reading.	Connected to the Horazon's Sanctum quest. What's unclear is whether this refers to the Elemental spell, or the cut fireman enemy.
5				Morta vespa gaella enumino evengin jatan lua gretan!	Most likely connected to Horazon's Sanctum, given its proximity to other related lines.
6				"The lieutenant of Belial is known as Grimspike. Beware this demon, for his strength appears immeasurable. Reading this scroll, and therefore speaking his name, near an arcane circle of binding will surely summon him there." Hmm. Near a cirle of binding, eh?	Related to the Horazon's Sanctum quest.
7				This looks like some sort of journal. "It seems that I may have brought something into this plane that even I cannot control. The creature that fell into my astral trap is a very deadly demon. I have been able to bind it at the bottom of a pit, but it kills everything that I have sent there in attempts to defeat it. While it cannot escape, it does block the tunnels that lead to my protected haven. I am tempted to use the switch to open the tunnels to see if it will just leave. But I fear it is smarter than most of the lesser demons that I have trapped before. If I could just lure it somewhere else..."	Related to the Horazon's Sanctum quest, and gives some insight into how to defeat the lieutenant of Azmodan.
18				Not a chance.	The Warrior's line is used in the demo, when attempting to take the stairs to level 3.
19				I would never use this.
20				I would have to equip that.
21				I cannot move this.
22				I cannot move this, yet.
23				I cannot open this.
25				I cannot lift this.
26				I cannot lift this, yet.
28				I cannot cast that, yet.
30				I can already do that.
31				I do not need that.
32				I do not need to do that.
33				I do not want that.
36				That would kill me.
37				I cannot do that.
38				No.
39				Yes.
40				That will not work.
41				That will not work here.
42				That will not work, yet.
44				It is too heavy.
45				It is too big.
47				I have a bad feeling about this.
48				Got milk?	Most likely intended for when the player clicks on a cow, but this is not one of the lines picked.
51				I could blow up the whole village...	This is interspersed with dialogue about cows, for whatever reason.
53				Too...heavy...	Again, this is interspersed alongside dialogue regarding cows.
57				The enchantment is gone.	Probably intendend for the Horazon's Sanctum quest.
58				All too easy.
59				Back to the grave.
60				Time to die!
63				Vengeance is mine.
64				Die!
65				Yes!
66				Ah.
67				Whew.
70				(pain grunts)	This is used in Hellfire when the player uses the Rage skill. Since only the Barbarian class can use Rage, and the Barbarian uses Warrior sounds, the Sorceror and Rogue sound effects remain unused there too.
72
73				Oh.
74				Whoa.
75				Thank the light.
76				What was that?
77				Hm?
78				Hmmm...
79				Mmm..hmmm...	This is used in Hellfire when picking up the Map of Tristram.
81				The town is safe from these foul spawn.	Probably intended for the Lair of the Worms cut quest.
84				You'll lure no more men to their deaths!	Probably intended for the Andariel cut quest.
85				Return to heaven, warrior of light.	Probably intended for the Izual cut quest.
86				I can see why they fear this weapon.	Possibly related to Fleshdoom/Shadowfang.
90				I've never been here before...	Possibly related to the Isle of the Sunless Sea.
93				This blade must be destroyed.	Possibly related to Fleshdoom/Shadowfang.
100				Maybe it's locked from the inside.	Probably intendend for the Horazon's Sanctum quest.
101				Looks like it's rusted shut.	Probably intendend for the Horazon's Sanctum quest.
102				Maybe there's another way.	Probably intendend for the Horazon's Sanctum quest.

The Rogue has a few lines that don't appear in the dialogue table within the code, and therefore cannot be played:

File Name	Audio	Transcript
sfx/rogue/rogue69c.wav		(pain grunt)
sfx/rogue/rogue71b.wav		(death sound)

Additionally, the Warrior has some more lines, most of them being outtakes:

File Name	Audio	Transcript	Notes
sfx/warrior/wario95b.wav		That's not such a big mushroom!	Outtakes for the line where the Warrior picks up the Black Mushroom.
sfx/warrior/wario95c.wav		I've never seen a mushroom that size.
sfx/warrior/wario95d.wav		That mushroom's the size of a Cadillac!
sfx/warrior/wario95e.wav		Damn! What a mushroom!
sfx/warrior/wario95f.wav		What a...*laughs uncontrollably*...mushroom!
sfx/warrior/warior96.wav		That stench...is it me, or are there zombies down here?	Not listed in the code table. sfx/warrior/wario96b.wav is used instead of this line.
sfx/warrior/wario96c.wav		What's that smell...me or zombies?	Not listed in the code table.
sfx/warrior/warior97.wav		The sanctity of this place has been fouled.	Not listed in the code table. sfx/warrior/wario97.wav is used instead of this line. A different voice actor speaks this line.
sfx/warrior/warior98.wav		Ugh, it's hot down here.	Not listed in the code table. sfx/warrior/wario98.wav is used instead of this line. A different voice actor speaks this line.

Misc Unused Dialogue

This is dialogue that is present, not used, and does not fall into one of the categories listed above.

File Name	Speaker	Audio	Transcript	Notes
storyt00.wav	Deckard Cain		The evil that you move against is the dark lord of terror, known to mortal men as Diablo. It was he who was imprisoned within the labyrinth, many centuries ago. Find Diablo, or we may never have the chance to rid the world of his evil again.
storyt03.wav	Deckard Cain		Yes, you speak of Lazarus...one who was once well-respected in our land. Even before King Leoric descended into madness and lost his son, the Archbishop Lazarus was acting...strangely. Lazarus seemed to be motivated by unseen forces, clinging to shadows, and acting out some dark plan that was not his own.
deadguy2.wav	Wounded Townsfolk		Please help...I barely escaped from...The Butcher...he killed...my wife...my children...I beg of you, in the name of God, avenge them!	In the Battle.net beta, this line is used by the Wounded Townsfolk that initiates the Butcher quest. However, in the retail version of the game, it is replaced by wound01.wav, which goes into much more detail (including mention of Lazarus) and has a different voice actor.
laz02.wav	Archbishop Lazarus		You are too late to save the child...now you will join him, in hell.	laz01.wav is used instead. laz02.wav is only a small snippet of laz01.wav.

Cut Spells

To do: Correctly format a lot of these.

In many prerelease screenshots, the spellbook can be seen with 6 tabs instead of the 4 that are present at release. If the player clicks at a very specific spot on the spellbook page, they can access the fifth page, which doesn't show any spells on it.

Sentinel/Sentinal

Sentinel (misspelled as "Sentinal" in the code) unleashes a floating eyeball that shoots fireballs at enemies. Given that this is very similar to Guardian, it was probably cut for this reason. Spell icons, graphics and code all exist for this spell, but it is unable to appear as a book or charges on a staff and the code for it is incomplete. The spell would've used a red book, similar to Fire Bolt and other fire spells.

• 

  The spell icon for Sentinel.

• 

  The fireball sent by the Sentinel?

• 

  The sentinel in its idle state.

• 

  The sentinel spawning.

The Town Portal spell uses a sound effect called sentinel.wav instead of portal.wav (which goes unused), indicating that this sound effect was probably used for the Sentinel spell at one point.

sentinal.wav (used for Town Portal)	portal.wav (unused)

Blood Boil

Blood Boil would've slowly killed a target in melee range, while also dealing damage to yourself. A spell icon and sound effects exist for this spell, both of which were re-used (except bldboil.wav, which is listed here) in Hellfire for the Rage skill. Unfortunately the code for it in the retail game is incomplete and does not work correctly.

• 

  The spell icon for Blood Boil.

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  blodbur0.cl2 and blodbur1.cl2.

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  blodburs.cl2 and blodbur2.cl2. This would've played if a character died, similar to the Stone Curse shattering effect.

Blood Ritual

Blood Ritual exchanges health for mana in various prototypes, but does not function in the retail game. A spell icon exists for this spell. Notable is that the spell icon design was later reused for the Slow Missiles skill in Diablo II.

• 

  The spell icon for Blood Ritual.

Doom Serpents

Doom Serpents appears to be a missile skill that shoots serpents at your foes. A spell icon exists for this spell, but it is a duplicate of the Guardian spell icon. Additionally, there are sound effects, graphics and an entry in the spell table within the code.

• 

  The spell icon for Doom Serpents.

• 

  The missile.

• 

  The "explosion" effect when it hits something.

Invisibility

This spell would've most likely made you invisible for a period of time, but the code does not function. A spell icon and a sound effect exists for this spell. The design of the spell icon was later reused for the Teleport skill in Diablo II.

• 

  The spell icon for Invisibility.

Etherealize

This spell would make you stop taking damage for a certain period of time.

• 

  The spell icon for Etherealize.

• 

  This icon would appear above your head, similar to Mana Shield.

Mind Mace

All that exists of this spell in the retail game is a single graphic, mindmace.cel, which looks like a spinning mace.

• 

Unused Misc Spell Icons

There are five additional unused spell icons that are not attached to any particular spell. Given that they have a red tint to the icon, they would've costed Life to cast instead of Mana.

• 
• 
• 
• 
• 

Unused Areas

To do: Get screenshots of these. According to the Diablo Evolution, one unused Catacombs pattern, with a circle in the middle of the room (screenshot with it can be seen on Alpha 3 page) is still in game files. Check it out.

The Hall of Heroes

levels/l1data/hero1.dun and levels/l1data/hero2.dun are unused sections of the Cathedral map. Originally, they were related to the Catacombs sections; in the pre-alpha versions of the game, the Catacombs were accessable throught a special room called "The Hall of Heroes", where you needed to read a book to open the door, but later the entrance to the Catacombs was changed to just a stairwell. The text was later re-used for the Chamber of Bone quest, and the mention of "The Hall of Heroes" was left as an oversight.

• 
• 

Old Butcher's Chamber

levels\l1data\rnd5.dun is an old variant of the Butcher's Chamber. Still can be seen on old screenshots.

• 

The Maze

levels/l1data/Lv1MazeA.DUN and levels/l1data/Lv1MazeB.DUN are unused - they are part of an unused Maze level. They were used for an old variant of the Ogden's Sign quest, that originally used the same name - "The Maze". In the final game, it uses a little sub-area instead of separate level.

The Lair?

levels/l3data/lair.dun is not used. It was likely intended for the cut quest involving worms beneath the town.

Unused Graphics

Items

To do: Even more unused graphics (this page features them).

All of these graphics can be found in objcurs.cel. The name field is the corresponding ITEM_IDS entry (from the Hellfire source code leak).

Name	Frame	Picture	Notes
	6		Used in Hellfire for applying oils.
ITEM_GOLDRING	19
ITEM_3COLORPOT	28		Stand for "three-colored potion". Could be an early version of rejuvenation potion.
ITEM_SPHERE	34
ITEM_CUBE	35
ITEM_PYRIMID	36
ITEM_JSPHERE	38
ITEM_JCUBE	39
ITEM_JPYRIMID	40
ITEM_VILE	41
ITEM_BLKBTL	42		Is used in Hellfire for oils. Stands for "black bottle".
ITEM_CLAW	53
ITEM_FANG	54
ITEM_BREAD	55		Possibly uses an older version of the palette, or is some terribly burnt bread. An unused item type, IT_FOOD, exists and is probably related.
ITEM_AMULET2	58		Two commented out unique items in the leaked Hellfire source code use this.
ITEM_AMULET3	59		A commented out unique item in the leaked Hellfire source code uses this.
ITEM_AMULET4	60		A commented out unique item in the leaked Hellfire source code uses this.
ITEM_POUCH1	61
ITEM_BIGBOTTLE	64
ITEM_DAGGER5	67
ITEM_CLUB1	81
ITEM_CLUB3	83
ITEM_MAGSWORD	85		Stands for "magic sword". Most likely was used for Azurewrath.
ITEM_SKULSWORD	86		Stands for "skull sword". Most likely was ued for Shadowfang.
ITEM_FHELM2	96		Stands for "full helm".
ITEM_CLOTHES	106
ITEM_MAP	108		Is used in Hellfire for the Tristram map. Was intended for the Map of the Stars quest.
ITEM_COMPSHLD	112		Stands for "complete shield".
ITEM_SMLSHLD	127		Stands for "small shield".
ITEM_STLSHRTBOW	132		Possibly stands for "steel short bow"?
ITEM_LONGSTAFF	137
ITEM_BALLNCHN	142		Stands for "ball chain".
ITEM_RINGARMOR	151
ITEM_GEMGRTAXE	168		Possibly stands for "gem great axe"?

These graphics can be found in /items within the MPQ.

File Name	Graphic	Notes
axeflip.cel
bottle.cel
fbow.cel
feye.cel		There isn't an "eye" item in the game.
fheart.cel		There isn't a "heart" item in the game.
food.cel		This is the only file in this table that is actually referenced by the game's code. It's also the only file in this table that isn't animated. Perhaps early items didn't have a flipping animation?
manaflip.cel		Perhaps mana was going to be collected like an item at one point.
wand.cel		Wands don't appear in the game at all.

Objects

The files can be found in /objects within diabdat.mpq.

File Name	Graphic(s)	Notes
bkurns.cel
candlabr.cel
candle.cel		candle2.cel is used, but has fewer variations in candles; it only has the half-melted candle animation with slightly different lighting.
dirtfall.cel		Possibly intended for the caves or the Lair of the Worms.
explod1.cel
explod2.cel
firewal1.cel
flame3.cel		Doesn't loop properly.
ghost.cel
switch2.cel
switch3.cel
vapor1.cel		Corrupt.
water.cel		No animated water appears in the game.
waterjug.cel

Other

This file, gendata/quotes.cel, is not loaded or referenced by the game's code and it isn't clear how it would be used. It has a transparent background.

Unused Audio

This section includes only audio that is not covered by the other sections above.

Not referenced in the code

The entirety of sfx/animals is not used, but oddly, it contains duplicates of sound effects which are in use.

File Name	Audio	Notes
sfx/items/barfire.wav		Duplicate of sfx/items/barlfire.wav.
sfx/items/flip.wav		An earlier rendition of flip1.wav.
sfx/items/flip1.wav		This is the first part of the flipping sound effect when items are dropped. In Diablo, the sound of the flipping and the item's impact on the ground are merged into one audio file, so this audio file is unneeded and unused. This was probably done as a last minute fix, because in Diablo II, the game has a separate flipping sound and item impact sound that works as intended.
sfx/items/flipsarc.wav		A slightly altered version of sfx/items/sarc.wav.
sfx/items/gold1.wav		A slightly quieter version of sfx/items/gold.wav
sfx/items/sarca.wav		These two sound effects are the two components of sarc.wav: the sound of the sarcophagus' lid sliding across its top, and the impact of the lid on the ground. sarc.wav is used, these two sounds are not.
sfx/items/sarcb.wav
sfx/items/sttest.wav		A stereo sound test. Confusingly, "Test Left" plays in the right ear, and "Test Right" plays in the left ear.
sfx/misc/bspirit.wav		Probably meant as an impact sound effect for Bone Spirit. The used sound effect, bsimpact.wav, doesn't have a fire sound to it, but you can still hear the rattling of bones.
sfx/misc/lmag.wav		Used in Hellfire.
sfx/towners/cow3.wav		These sound effects were removed from the code with a preprocessor macro. They depict various sound effects for animals that do not appear in the game, such as goats, chickens, and dogs. Why they're referred to as "cow" is a mystery, since cow1.wav and cow2.wav are actually cows.
sfx/towners/cow4.wav
sfx/towners/cow5.wav
sfx/towners/cow6.wav
sfx/towners/cow7.wav		Used in Hellfire for the Jester staff effect.
sfx/towners/cow8.wav		Referenced in the code by Hellfire, but it goes unused.

Referenced in the code

The code names as they are specified here were retrieved from the leaked Hellfire source code.

Code Name	File Name	Audio	Notes
PS_WALK2	sfx/misc/walk2.wav		For whatever reason, the code for randomizing walk sounds is commented out. Additionally, in Hellfire, no sound effects play when the player walks, probably to simplify the addition of the Run feature.
PS_WALK3	sfx/misc/walk3.wav
PS_WALK4	sfx/misc/walk4.wav
PS_FMAG	sfx/misc/fmag.wav
PS_TMAG	sfx/misc/tmag.wav
PS_LGHIT	sfx/misc/lghit.wav
PS_LGHIT1	sfx/misc/lghit1.wav
IS_ARMRFKD	sfx/items/armrfkd.wav		Probably intended for when body armor breaks. No sound effect plays when something is broken.
IS_FMAG	sfx/items/flipmag.wav		The game has code for randomly picking one of these sound effects, but this sound effect never gets triggered.
IS_FMAG1	sfx/items/flipmag1.wav
IS_FSIGN	sfx/items/flipsign.wav		Due to a typo in the code, this sound effect goes unused. sfx/items/invsign.wav is used instead.
IS_HLMTFKD	sfx/items/hlmtfkd.wav		Probably intended to be used when a helmet is broken. No sound effect plays when something breaks.
IS_SHLDFKD	sfx/items/shielfkd.wav		Probably intended to be used when a shield is broken. No sound effect plays when something breaks.
IS_SWRDFKD	sfx/items/swrdfkd.wav		Probably intended to be used when a weapon is broken. No sound effect plays when something breaks.
IS_CAST1	sfx/misc/cast1.wav
IS_CAST10	sfx/misc/cast10.wav
IS_CAST12	sfx/misc/cast12.wav
IS_CAST3	sfx/misc/cast3.wav
IS_CAST5	sfx/misc/cast5.wav
LS_HEALING	sfx/misc/healing.wav		Healing uses sfx/misc/cast8.wav.
LS_ARROWALL	sfx/misc/arrowall.wav
LS_CHLTNING	sfx/misc/chltning.wav		Chain Lightning uses the same sound effects as Lightning.
LS_FBALL	sfx/misc/fball.wav		Fire Ball uses the same sound effects as Fire Bolt.
LS_FBOLT2	sfx/misc/fbolt2.wav		The code doesn't contain a randomization entry for LS_FBOLT1, so this goes unused (probably by mistake)
LS_FIRIMP1	sfx/misc/firimp1.wav
LS_FLASH	sfx/misc/flash.wav		Flash uses sfx/misc/nova.wav and sfx/misc/elecimp1.wav.
LS_GOLUMDED	sfx/misc/golumded.wav		Golems play skeleton sound effects when they die.
LS_HYPER	sfx/misc/hyper.wav		The code contains a single comment about a "hyperspace spell" that would've been attached to unique items.
LS_INVPOT	sfx/misc/invpot.wav		Seems like it might have been used at one point for when potions were drank.
LS_LTNING	sfx/misc/ltning.wav		sfx/misc/lning1.wav is used for Lightning, not this sound effect.
LS_SCURSE	sfx/misc/scurse.wav		Stone Curse uses LS_FIRIMP2.
LS_SHATTER	sfx/misc/shatter.wav		Stone Curse doesn't play any sound effects when enemies are shattered by it.
LS_SOULFIRE	sfx/misc/soulfire.wav
LS_SPOUTLOP	sfx/misc/spoutlop.wav		Most likely intended for Inferno.
LS_STORM	sfx/misc/storm.wav
LS_VTHEFT	sfx/misc/vtheft.wav
LS_WALLSTRT	sfx/misc/wallstrt.wav		sfx/misc/wallloop.wav is used by Fire Wall.

Hidden Developer Messages

Installer

Hidden between Diablo's horns in the setup and boot executables for the first Windows release.

Original	Edited

The text on the left reads "BUY WAR II", while the other set reads "NATALIE PORTMAN ROCKS". While it's not 100% certain what the former refers to, it's most likely Warcraft II, another Blizzard game.

Diablo's Lair

Entering Diablo's lair plays an ominous-sounding demonic chant. Reversing the audio, however, reveals the decidedly non-demonic message of "Eat your vegetables and brush after every meal." This is satirizing the Satanic Panic, in particular the idea that certain songs could be played backwards to reveal demonic messages.

Original	Reversed