This page details one or more prototype versions of Sonic & Knuckles.
| To do: Check the remaining prototypes for any other notable differences. |
Released on February 23, 2008 by drx, these prototypes were part of a huge package filled with prototypes from Sega of America from around 1994-95. Dated after Sonic the Hedgehog 3, these prototypes offer a look behind the scenes at the game's development.
Sub-Pages
| Sonic 3C 0408 Dated April 8, 1994. Early build of an unreleased "Limited Edition" version of Sonic 3, while many things were still being implemented. |
Other Builds
Sonic & Knuckles 0612
- Selecting "Special Stage 1" will still bring you to the Blue Spheres minigame.
- There's still no code to enable Blue Spheres.
- While the password selection for Blue Spheres is present, it can't be selected yet.
- Tails' life counter now calls him "Miles" on a Japanese system.
- The Marble Garden Zone Act 1 miniboss crash glitch is still present.
- The Mushroom Hill Zone Act 2 boss' starting position is still shifted slightly left compared to the final, allowing endless hits on the boss without destroying the satellite, with the first 7 hits counting towards defeating the boss.
Sonic & Knuckles 0618
- Selecting "Special Stage 1" will no longer bring you to the Blue Spheres minigame.
- If Sonic 1 is locked on, the characters on the "NO WAY!" screen are now colored. However, the code to enable Blue Spheres is still absent.
- In Debug Mode, the level coordinates now only show when in edit mode, rather than being shown all the time.
- Beating the Marble Garden Zone Act 1 miniboss with player 2 offscreen will no longer crash the game. However, it now causes the game to reset back to the SEGA screen.
- The falling spikes at the first set of stairs in Lava Reef Zone Act 1 have been removed.
Sonic & Knuckles 0619
- The code to enable Blue Spheres is still absent if Sonic 1 is locked on.
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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) |
Sega Master System | Sonic the Hedgehog • Sonic the Hedgehog 2 • Sonic Chaos (Prototypes) • Sonic Blast |
Game Gear | Sonic the Hedgehog (Prototype) • Sonic the Hedgehog 2 (Prototype) • Sonic Chaos (Prototypes) • Sonic Triple Trouble (Prototypes) • Sonic Labyrinth • Sonic Blast (Prototypes) |
Arcade | SegaSonic the Hedgehog (Prototype) |
Sega CD | Sonic the Hedgehog CD (Prototypes) |
32X | Knuckles' Chaotix (Prototypes) |
Windows | Sonic the Hedgehog CD (1996, 2011) • Sonic 3D Blast • Sonic Heroes • Sonic Adventure DX: Director's Cut (2004, Demo, 2011) • Sonic Adventure 2 • Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic the Hedgehog 4: Episode II (Prototype) • Sonic Generations (Demos) • Sonic Lost World • Sonic Mania • Sonic Forces • Sonic Colors: Ultimate • Sonic Frontiers |
Sega Saturn | Sonic X-treme • Sonic 3D Blast (Prototype) |
Dreamcast | Sonic Adventure (Prototypes) • Sonic Adventure 2 (Prototypes) |
Neo Geo Pocket Color | Sonic the Hedgehog Pocket Adventure (Prototypes) |
GameCube | Sonic Adventure 2: Battle (Demo) • Sonic Adventure DX: Director's Cut (Prototypes) • Sonic Heroes (Prototypes) • Shadow the Hedgehog |
Game Boy Advance | Sonic Advance (Prototype) • Sonic Advance 2 (Prototype) • Sonic Advance 3 (Prototype) • Sonic the Hedgehog Genesis |
PlayStation 2 | Sonic Heroes • Shadow the Hedgehog • Sonic Unleashed |
Xbox | Sonic Heroes • Shadow the Hedgehog |
Nintendo DS | Sonic Rush (Demo) • Sonic Rush Adventure |
Xbox 360 | Sonic the Hedgehog (Demo) • Sonic Unleashed (Preview) • Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic Generations (Demos) • Sonic Adventure DX • Sonic Adventure 2 |
Wii | Sonic Unleashed • Sonic Colors • Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic and the Secret Rings • Sonic and the Black Knight |
PlayStation 3 | Sonic the Hedgehog • Sonic Unleashed • Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic Adventure DX • Sonic Adventure 2 • Sonic Generations (Demos) • Sonic the Hedgehog CD (2011) |
Nintendo 3DS | Sonic Generations • Sonic Lost World |
Wii U | Sonic Lost World |
PlayStation 4, Xbox One, Nintendo Switch | Sonic Mania • Sonic Colors: Ultimate • Sonic Frontiers |
PlayStation 5, Xbox Series X | Sonic Origins • Sonic Frontiers |
J2ME | Sonic the Hedgehog Mobile |
N-Gage | Sonic N |
iOS, Android | Sonic the Hedgehog 4: Episode I (Prototypes) • Sonic the Hedgehog • Sonic the Hedgehog 2 • Sonic the Hedgehog CD |
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Racing Games |
Game Gear | Sonic Drift • Sonic Drift 2 |
Windows | Sonic R • Sonic Riders • Sonic & SEGA All-Stars Racing • Sonic & All-Stars Racing Transformed • Team Sonic Racing |
Sega Saturn | Sonic R (Preview) |
PlayStation 2 | Sonic Riders • Sonic Riders: Zero Gravity |
PlayStation 3, Wii U | Sonic & All-Stars Racing Transformed |
GameCube, Xbox | Sonic Riders |
Nintendo DS | Sonic & SEGA All-Stars Racing |
PlayStation Portable | Sonic Rivals • Sonic Rivals 2 |
Xbox 360 | Sonic & SEGA All-Stars Racing • Sonic & All-Stars Racing Transformed |
Wii | Sonic & SEGA All-Stars Racing • Sonic Riders: Zero Gravity |
Nintendo 3DS | Sonic & All-Stars Racing Transformed |
Adobe Flash | Sonic Rivals Dash |
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Sports/Fighting Games |
Sega Genesis | Sonic the Hedgehog Spinball (Prototypes) |
Sega Master System | Sonic Spinball |
Game Gear | Sonic Spinball (Prototypes) |
Arcade | Sonic Championship |
Game Boy Advance | Sonic Battle |
Nintendo DS | Mario & Sonic at the Olympic Games • Mario & Sonic at the Olympic Winter Games |
Wii | Mario & Sonic at the Olympic Games • Mario & Sonic at the Olympic Winter Games • Mario & Sonic at the London 2012 Olympic Games |
Nintendo 3DS | Mario & Sonic at the London 2012 Olympic Games |
Wii U | Mario & Sonic at the Rio 2016 Olympic Games |
J2ME | Sonic at the Olympic Games |
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Puzzle Games |
Sega Genesis | Sonic Eraser • Dr. Robotnik's Mean Bean Machine (Prototypes) |
Sega Master System, Game Gear | Dr. Robotnik's Mean Bean Machine |
Arcade | SegaSonic Bros. |
Adobe Flash | Sonic Jigsaw 2 |
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Educational Games |
Arcade | SegaSonic Cosmo Fighter |
Sega Master System | Sonic's Edusoft |
Windows | Sonic's Schoolhouse |
Sega Pico | Sonic the Hedgehog's Gameworld (Prototypes) • Tails and the Music Maker (Prototypes) |
Leapster | Sonic X |
LeapFrog Didj | Sonic the Hedgehog |
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Sonic Boom |
Wii U | Rise of Lyric |
Nintendo 3DS | Shattered Crystal • Fire & Ice |
Adobe Flash | Link 'n Smash |
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Compilations |
Sega Genesis | Sonic Classics |
Sega Saturn | Sonic Jam (Demo) |
Windows | Sonic & Knuckles Collection • Sonic Mega Collection Plus • Sonic Origins |
GameCube | Sonic Mega Collection (Prototype) • Sonic Gems Collection |
PlayStation 2 | Sonic Mega Collection Plus • Sonic Gems Collection |
Xbox | Sonic Mega Collection Plus |
Nintendo DS | Sonic Classic Collection |
Xbox One, Xbox Series X, PlayStation 4, PlayStation 5, Nintendo Switch | Sonic Origins |
Game.com | Sonic Jam |
Plug & Play | Super Sonic Gold |
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Other |
Game Gear | Tails' Skypatrol • Tails Adventures |
Dreamcast | Sonic Shuffle (Debug Version) |
Nintendo DS | Sonic Chronicles: The Dark Brotherhood |
Windows, Mac OS X | The Murder of Sonic the Hedgehog |
J2ME | Sonic Jump |
iOS, Android | Sonic Jump • Sonic Dash • Sonic Runners • Sonic Runners Adventure (Prototype) |
Adobe Flash | Sonic The Broad Jump • Sonic and the Black Knight: Knight in Training |