SegaSonic Cosmo Fighter is a ride machine for young kids where you fight Eggman in space.
This was considered a holy grail among Sonic game collectors due to its obscurity and how few units remain in the wild; luckily, a machine was found and the ROM was dumped in 2017. An even more obscure (and presumably even rarer) English version for Sega World Sydney was found in 2021 and dumped on February 19, 2023.
This page currently covers the Japanese version.
Section Names
There are some strings starting at 0x4F2 that would have displayed where the player is in the game. An old initialization routine at 0x390 can be called to display this text in-game, but it tends to corrupt graphics at times. Note that these appear to reference a working title, "Sonic Jet".
SONIC JET : TEST MODE
SONIC JET : WARNING
SONIC JET : TITLE
SONIC JET : DEMO
SONIC JET : OPENING
SONIC JET : GAME
SONIC JET : ENDING
Debug Functions
Some debugging functions are in the game fully intact, using controls that are not present on the released machine:
- The flag at 0xFF800A allows the player to pause the game, mapped as P2 Button 1 in MAME.
- The flag at 0xFF8006 controls the game speed. P1 Start decreases this value, while P2 Start increases it.
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| Sega Genesis | Sonic the Hedgehog (Prototype) • Sonic the Hedgehog 2 (Prototypes) • Sonic the Hedgehog 3 (Prototype) • Sonic & Knuckles (Prototypes) • Sonic 3 & Knuckles • Sonic 3D Blast (Prototypes) |
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| Sega Master System | Sonic the Hedgehog • Sonic the Hedgehog 2 • Sonic Chaos (Prototypes) • Sonic Blast |
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| Game Gear | Sonic the Hedgehog (Prototype) • Sonic the Hedgehog 2 (Prototype) • Sonic Chaos (Prototypes) • Sonic Triple Trouble (Prototypes) • Sonic Labyrinth • Sonic Blast (Prototypes) |
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| Arcade | SegaSonic the Hedgehog (Prototype) |
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| Sega CD | Sonic the Hedgehog CD (Prototypes) |
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| 32X | Knuckles' Chaotix (Prototypes) |
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| Windows | Sonic the Hedgehog CD (1996) • Sonic 3D Blast • Sonic Heroes (Prototypes) • Sonic Adventure DX: Director's Cut (2004) (Demo) • Sonic the Hedgehog 4: Episode I • Sonic the Hedgehog CD (2011) • Sonic Adventure DX: Director's Cut (2011) • Sonic Generations (Demos) • Sonic the Hedgehog 4: Episode II (Prototype) • Sonic Adventure 2 • Sonic Lost World • Sonic Mania • Sonic Forces • Sonic Colors: Ultimate • Sonic Frontiers • Sonic Superstars • Sonic X Shadow Generations |
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| Sega Saturn | Sonic X-treme • Sonic 3D Blast (Prototype) |
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| Dreamcast | Sonic Adventure (Prototypes) • Sonic Adventure 2 (Prototypes) |
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| Neo Geo Pocket Color | Sonic the Hedgehog Pocket Adventure (Prototypes) |
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| GameCube | Sonic Adventure 2: Battle (Demo) • Sonic Adventure DX: Director's Cut (Prototypes) • Sonic Heroes (Prototypes) • Shadow the Hedgehog |
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| Game Boy Advance | Sonic Advance (Prototype) • Sonic Advance 2 (Prototype) • Sonic Advance 3 (Prototype) • Sonic the Hedgehog Genesis |
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| PlayStation 2 | Sonic Heroes (Prototypes) • Shadow the Hedgehog • Sonic Unleashed |
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| Xbox | Sonic Heroes (Prototypes) • Shadow the Hedgehog |
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| DoJa, J2ME, BREW | Sonic the Hedgehog • Sonic the Hedgehog 2 |
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| N-Gage | Sonic N |
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| Nintendo DS | Sonic Rush (Demo) • Sonic Rush Adventure • Sonic Colors (Demo) |
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| Xbox 360 | Sonic the Hedgehog (Prototypes) • Sonic Unleashed (Prototypes) • Sonic Adventure DX: Director's Cut (Prototypes) • Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic Generations (Demos) • Sonic the Hedgehog CD (2011) (Demo) • Sonic the Hedgehog 4: Episode II • Sonic Adventure 2 |
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| Wii | Sonic Unleashed • Sonic Colors • Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic and the Secret Rings • Sonic and the Black Knight |
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| PlayStation 3 | Sonic the Hedgehog • Sonic Unleashed • Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic Generations (Demos) • Sonic the Hedgehog CD (2011) (Demo) • Sonic the Hedgehog 4: Episode II • Sonic Adventure 2 |
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| Nintendo 3DS | Sonic Generations • Sonic Lost World |
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| Wii U | Sonic Lost World |
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| PlayStation 4, Xbox One, Nintendo Switch | Sonic Mania • Sonic Forces (Demo) • Sonic Colors: Ultimate • Sonic Frontiers • Sonic Superstars • Sonic X Shadow Generations |
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| Amazon Luna | Sonic Mania • Sonic Colors: Ultimate |
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| PlayStation 5, Xbox Series X | Sonic Frontiers • Sonic Superstars • Sonic X Shadow Generations |
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| iOS, Android, tvOS | Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic the Hedgehog 4: Episode II (Prototype) • Sonic the Hedgehog • Sonic the Hedgehog 2 • Sonic the Hedgehog CD (Demo) |
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| Ouya, NVIDIA Shield | Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic the Hedgehog 4: Episode II (Prototype) • Sonic the Hedgehog CD (Demo) |
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| Racing Games |
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| Game Gear | Sonic Drift • Sonic Drift 2 |
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| Windows | Sonic R • Sonic Riders • Sonic & SEGA All-Stars Racing • Sonic & All-Stars Racing Transformed • Team Sonic Racing |
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| Sega Saturn | Sonic R (Preview) |
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| PlayStation 2 | Sonic Riders (Prototype) • Sonic Riders: Zero Gravity |
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| PlayStation 3, Wii U | Sonic & All-Stars Racing Transformed |
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| GameCube, Xbox | Sonic Riders |
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| Nintendo DS | Sonic & SEGA All-Stars Racing |
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| PlayStation Portable | Sonic Rivals • Sonic Rivals 2 |
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| Xbox 360 | Sonic & SEGA All-Stars Racing • Sonic & All-Stars Racing Transformed • Sonic Free Riders |
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| Wii | Sonic & SEGA All-Stars Racing • Sonic Riders: Zero Gravity |
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| Nintendo 3DS | Sonic & All-Stars Racing Transformed |
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| PlayStation 4, Xbox One, Nintendo Switch, Amazon Luna | Team Sonic Racing |
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| Adobe Flash | Sonic Rivals Dash |
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| Sports/Fighting Games |
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| Sega Genesis | Sonic the Hedgehog Spinball (Prototypes) |
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| Sega Master System | Sonic Spinball |
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| Game Gear | Sonic Spinball (Prototypes) |
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| Arcade | Sonic Championship • Mario & Sonic at the Rio 2016 Olympic Games |
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| Game Boy Advance | Sonic Battle |
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| Nintendo DS | Mario & Sonic at the Olympic Games • Mario & Sonic at the Olympic Winter Games |
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| Xbox 360 | Sonic the Fighters |
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| Wii | Mario & Sonic at the Olympic Games • Mario & Sonic at the Olympic Winter Games • Mario & Sonic at the London 2012 Olympic Games |
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| Nintendo 3DS | Mario & Sonic at the London 2012 Olympic Games |
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| Wii U | Mario & Sonic at the Rio 2016 Olympic Games |
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| J2ME | Sonic the Hedgehog Golf • Sonic at the Olympic Games • Sonic Spinball |
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| BREW | Sonic at the Olympic Games • Sonic Spinball |
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| Puzzle Games |
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| Sega Genesis | Sonic Eraser • Dr. Robotnik's Mean Bean Machine (Prototypes) |
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| Sega Master System, Game Gear | Dr. Robotnik's Mean Bean Machine |
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| Arcade | SegaSonic Bros. |
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| Adobe Flash | Sonic Jigsaw 2 |
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| Educational |
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| Sega Master System | Sonic's Edusoft |
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| Windows | Sonic's Schoolhouse |
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| Sega Pico | Sonic the Hedgehog's Gameworld (Prototypes) • Tails and the Music Maker (Prototypes) |
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| Leapster | Sonic X |
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| LeapFrog Didj | Sonic the Hedgehog |
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| Sonic Boom |
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| Wii U | Rise of Lyric (Prototype) |
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| Nintendo 3DS | Shattered Crystal • Fire & Ice |
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| Adobe Flash | Link 'n Smash |
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| Compilations |
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| Sega Genesis | Sonic Classics |
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| Sega Saturn | Sonic Jam (Demo) |
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| Windows | Sonic & Knuckles Collection • Sonic Mega Collection Plus • Sonic Origins |
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| GameCube | Sonic Mega Collection (Prototype) • Sonic Gems Collection |
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| PlayStation 2 | Sonic Mega Collection Plus • Sonic Gems Collection |
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| Xbox | Sonic Mega Collection Plus |
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| Nintendo DS | Sonic Classic Collection |
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| Xbox One/Series X, PlayStation 4/5, Nintendo Switch | Sonic Origins |
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| Game.com | Sonic Jam |
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| Plug & Play | Super Sonic Gold |
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| Other |
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| Game Gear | Tails' Skypatrol • Tails Adventures |
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| Arcade | SegaSonic Cosmo Fighter |
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| Sega Saturn | Sonic the Hedgehog into Dreams... |
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| Dreamcast | Sonic Shuffle (Debug Version) |
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| Nintendo DS | Sonic Chronicles: The Dark Brotherhood |
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| Windows, Mac OS X | The Murder of Sonic the Hedgehog |
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| J2ME | Sonic Jump (2005) • Sonic Jump (2007) |
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| iOS, Android | Sonic Jump • Sonic Dash • Sonic Runners • Sonic Runners Adventure (Prototype) |
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| Adobe Flash | Sonic the Broad Jump • Sonic and the Black Knight: Knight in Training |
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