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Proto:Sonic the Hedgehog 4 - Episode I

From The Cutting Room Floor
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This page details one or more prototype versions of Sonic the Hedgehog 4 - Episode I.

Sonic the Hedgehog 4 - Episode I had... an interesting development cycle, to say the least. Three prototypes are known to exist (although one, a PS3 "Sony QA" build, is yet to be released publicly), all seemingly coming from the same timeframe.

Sub-Pages

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 PartnerNET Prototype
Xbox 360 build dated February 9, 2010, notable for causing such extreme fan backlash that the game's release was delayed to fix the cited issues.
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 Japanese WiiWare Prototype
Wii build also dated February 9, 2010, which had accidentally been published on the game's release date.

General

  • All three prototypes bear strong resemblances to the iOS/Android version. They contain the two controversial "gimmick" levels, less-polished physics, and simpler Stage Select screen that were replaced in most releases.
The Sonic the Hedgehog series
Sega GenesisSonic the Hedgehog (Prototype) • Sonic the Hedgehog 2 (Prototypes) • Sonic the Hedgehog 3 (Prototype) • Sonic & Knuckles (Prototypes) • Sonic 3 & Knuckles • Sonic 3D Blast (Prototypes) • Sonic Spinball (Prototype)
Dr. Robotnik's Mean Bean Machine (Prototype) • Sonic Classics
Sega Master SystemSonic the Hedgehog • Sonic the Hedgehog 2 • Sonic Chaos (Prototypes) • Sonic Blast • Sonic Spinball
Dr. Robotnik's Mean Bean Machine • Sonic's Edusoft
Game GearSonic the Hedgehog (Prototype) • Sonic the Hedgehog 2 (Prototype) • Sonic Chaos (Prototypes) • Sonic Triple Trouble (Prototypes)
Sonic Spinball (Prototype) • Sonic Drift 2 • Sonic Labyrinth • Sonic Blast (Prototypes)
Dr. Robotnik's Mean Bean Machine • Tails' Skypatrol • Tails Adventures
ArcadeSegaSonic Cosmo Fighter • SegaSonic the Hedgehog (Prototype) • Sonic Championship • SegaSonic Bros.
Sega CDSonic the Hedgehog CD (Prototypes‎)
32XKnuckles' Chaotix (Prototypes)
Sega PicoSonic the Hedgehog's Gameworld • Tails and the Music Maker (Prototypes)
WindowsSonic the Hedgehog CD (1996, 2011) • Sonic's Schoolhouse • Sonic & Knuckles Collection • Sonic 3D Blast • Sonic R
Sonic Heroes • Sonic Riders • 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 & Sega All-Stars Racing • Sonic & All-Stars Racing Transformed • Team Sonic Racing
Sega SaturnSonic X-treme • Sonic 3D Blast (Prototype) • Sonic Jam (Prototype) • Sonic R (Preview)
Game.comSonic Jam
DreamcastSonic Adventure (Prototypes) • Sonic Adventure 2 (Prototypes) • Sonic Shuffle (Debug Version)
Neo Geo Pocket ColorSonic the Hedgehog Pocket Adventure (Prototypes)
Game Boy AdvanceSonic Advance (Prototype) • Sonic Advance 2 • Sonic Advance 3 (Prototype) • Sonic Battle • Sonic the Hedgehog Genesis
GameCubeSonic Adventure 2: Battle (Demo) • Sonic Adventure DX: Director's Cut (Prototypes) • Sonic Heroes (Prototypes)
Shadow the Hedgehog • Sonic Mega Collection (Prototype) • Sonic Gems Collection • Sonic Riders
PlayStation 2Sonic Heroes • Shadow the Hedgehog • Sonic Riders • Sonic Riders: Zero Gravity • Sonic Unleashed • Sonic Gems Collection
XboxSonic Heroes • Shadow the Hedgehog • Sonic Riders
Nintendo DSSonic Rush (Demo) • Mario & Sonic at the Olympic Games (Beijing 2008) • Sonic Chronicles: The Dark Brotherhood
Sonic & SEGA All-Stars Racing • Sonic Classic Collection
PlayStation PortableSonic Rivals
Xbox 360Sonic the Hedgehog (Demo) • Sonic Unleashed (Preview) • Sonic & Sega All-Stars Racing • Sonic the Hedgehog 4 - Episode I (Prototypes) • Sonic Generations (Demos) • Sonic Adventure 2 • Sonic & All-Stars Racing Transformed
WiiSonic Unleashed • Sonic Colors • Mario & Sonic at the Olympic Games (Beijing 2008, London 2012) • Sonic the Hedgehog 4 - Episode I (Prototypes) • Sonic & Sega All-Stars Racing • Sonic and the Black Knight • Sonic Riders: Zero Gravity
PlayStation 3Sonic the Hedgehog • Sonic the Hedgehog 4 - Episode I (Prototypes) • Sonic Adventure 2 • Sonic Generations (Demos) • Sonic & All-Stars Racing Transformed
Nintendo 3DSSonic Generations • Mario & Sonic at the Olympic Games (London 2012) • Sonic & All-Stars Racing Transformed
Wii USonic Lost World • Sonic Boom: Rise of Lyric • Sonic & All-Stars Racing Transformed • Mario & Sonic at the Olympic Games (Rio 2016)
Nintendo Switch, PlayStation 4, Xbox OneSonic Mania
J2MESonic the Hedgehog Mobile • Sonic Jump
LeapFrog SystemsSonic X • Sonic the Hedgehog
N-GageSonic N
iOS, AndroidSonic the Hedgehog 4 - Episode I (Prototypes) • Sonic the Hedgehog • Sonic the Hedgehog 2 • Sonic the Hedgehog CD
Sonic Jump • Sonic Dash • Sonic Runners  • Sonic Runners Adventure (Prototype)
Plug & PlaySuper Sonic Gold
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