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    Sega CD Games
    Sonic the Hedgehog CD (Jun 21, 1993 prototype) - Play Now
    Sonic Classic Heroes (2022 Update!) (v0.15.03d8)

    Sonic Classic Heroes (2022 Update!) (v0.15.03d8)

    Penguin Brothers (Japan)

    Penguin Brothers (Japan)

    Donkey Kong Country (USA)

    Donkey Kong Country (USA)

    Contra (USA)

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    Sonic & Knuckles + Sonic the Hedgehog 3 (World)

    Sonic & Knuckles + Sonic the Hedgehog 3 (World)

    Kirby And The Amazing Mirror (E)(Rising Sun)

    Kirby And The Amazing Mirror (E)(Rising Sun)

    Sonic the Hedgehog CD (Jun 21, 1993 prototype)(43.8 MB)

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    Welcome to Animal Crossing - Wild World (USA)

    Super Metroid (Japan, USA) (En,Ja)

    Super Metroid (Japan, USA) (En,Ja)

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    Battle City (Japan)

    Crash Team Racing

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    Mario 64 Sonic Edition Plus v2.2.2

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    007 - GoldenEye (USA)

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    Metal Slug X (USA)

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    Dragon Ball Z - Supersonic Warriors 2 (USA)

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    Chrono Trigger (USA)

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    Smash Remix 1.3.0

    Smash Remix 1.3.0

    Street Fighter II' - Champion Edition (street fighter 2' 920513 etc)

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    Kirby Super Star Ultra (USA)

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    Sonic Classic Heroes

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    Castlevania - Symphony Of The Night

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    Sonic CD (USA)

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    Parappa the Rapper

    Mega Man X4

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    Pokemon Fire Red Extended (v3.2)

    Pokemon Fire Red Extended (v3.2)

    Sonic 3 Complete

    Sonic 3 Complete

    Sonic 2 Heroes

    Sonic 2 Heroes

    Cooler Sonic in Sonic 3 & Knuckles

    Cooler Sonic in Sonic 3 & Knuckles

    Pokemon Radical Red v4.0

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    Sonic The Hedgehog - Pocket Adventure (World)

    Sonic The Hedgehog - Pocket Adventure (World)

    Sonic the Hedgehog 2 (World)

    Sonic the Hedgehog 2 (World)

    Mother 3 (Eng. Translation)

    Mother 3 (Eng. Translation)

    Sonic the Hedgehog CD (Jun 21, 1993 prototype)

    Unreleased 1993 Sonic the Hedgehog CD Sega CD prototype with hidden levels, early designs, and unique mechanics. Explore at Hidden Palace.

    What is Sonic the Hedgehog CD (Jun 21, 1993 prototype)?

    Sonic the Hedgehog CD (Jun 21, 1993 prototype) is an early developmental build of the Sega CD platformer released during the formative stages of the iconic Sonic the Hedgehog series. This prototype version predates the final game and includes unfinished mechanics, placeholder assets, and experimental design choices. As a Sega CD title, it leverages the console’s enhanced capabilities for CD-quality audio and expanded level design. The prototype is notable for offering a glimpse into the game’s evolving time-travel narrative and high-speed 2D platforming roots.

    Game Features

    • Time-Travel Mechanics: Navigate between past and future versions of levels to solve puzzles and uncover secrets.
    • High-Speed Platforming: Classic Sonic gameplay focused on momentum, loops, and mid-air tricks.
    • CD-Quality Soundtrack: Early versions of the game’s iconic music tracks with potential variations in audio design.
    • Hidden Elements: Secret areas, shortcuts, and collectibles typical of the Sonic series.
    • Prototype-Specific Content: Unfinished levels, debug tools, and altered enemy placements unique to this build.

    How to Play Sonic the Hedgehog CD (Jun 21, 1993 prototype)?

    1. Movement: Use arrow keys or WASD to control Sonic’s directional movement.
    2. Basic Actions: Press Z (A button equivalent) to jump and X (B button equivalent) to interact with objects or activate time-travel gates.
    3. Advanced Maneuvers: Hold Space to rev up Sonic’s spin dash ability for high-speed bursts.
    4. Time Travel: Activate designated portals to shift between eras, altering level layouts and enemy placements.
    5. Collectibles: Gather Rings to boost health and locate Time Stones to progress through the story.

    Frequently Asked Questions

    What makes this prototype different from the final game?
    This build includes unfinished levels, placeholder graphics, and experimental mechanics like altered time-travel triggers and unpolished boss fights.

    Can I play as other characters like Tails or Knuckles?
    No—this prototype focuses solely on Sonic’s gameplay, with no confirmed support for additional characters in this early version.

    How does the time-travel system work in this build?
    Players switch between eras via designated gates. Changes in the past often unlock new paths or hazards in the future, though some mechanics may be incomplete or buggy in this prototype.