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    Sega CD Games
    Sonic the Hedgehog CD (Jun 21, 1993 prototype) - Play Now
    Sonic The Hedgehog - Triple Trouble (USA, Europe)

    Sonic The Hedgehog - Triple Trouble (USA, Europe)

    EarthBound (USA)

    EarthBound (USA)

    Sonic CD (USA)

    Sonic CD (USA)

    Sonic & Knuckles + Sonic the Hedgehog 3 (World)

    Sonic & Knuckles + Sonic the Hedgehog 3 (World)

    Crash Team Racing

    Crash Team Racing

    Kirby's Dream Land 2 (USA, Europe)

    Kirby's Dream Land 2 (USA, Europe)

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

    Kirby Super Star (USA)

    Kirby Super Star (USA)

    Mega Man X4

    Mega Man X4

    Donkey Kong (USA)

    Donkey Kong (USA)

    Kirby - Squeak Squad (USA)

    Kirby - Squeak Squad (USA)

    Dragon Ball Z - Supersonic Warriors (E)(Rising Sun)

    Dragon Ball Z - Supersonic Warriors (E)(Rising Sun)

    Sonic the Hedgehog CD (Jun 21, 1993 prototype)

    Sonic the Hedgehog CD (Jun 21, 1993 prototype)

    Donkey Kong Country (USA)

    Donkey Kong Country (USA)

    007 - GoldenEye (USA)

    007 - GoldenEye (USA)

    Pokemon Red Full Color Hack

    Pokemon Red Full Color Hack

    Super Smash Bros. (USA)

    Super Smash Bros. (USA)

    Sonic 4: Cybernetic Outbreak

    Sonic 4: Cybernetic Outbreak

    Street Fighter II' - Champion Edition (YYC bootleg set 2, 920313 etc) [Bootleg]

    Street Fighter II' - Champion Edition (YYC bootleg set 2, 920313 etc) [Bootleg]

    A.P.B. - All Points Bulletin (USA, Europe)

    A.P.B. - All Points Bulletin (USA, Europe)

    Smash Remix 1.5.0

    Smash Remix 1.5.0

    Earthworm Jim - Special Edition

    Earthworm Jim - Special Edition

    Welcome to Animal Crossing - Wild World (USA)

    Welcome to Animal Crossing - Wild World (USA)

    Sonic The Hedgehog 2 (Europe)

    Sonic The Hedgehog 2 (Europe)

    Sonic the Hedgehog Megamix 4.0b

    Sonic the Hedgehog Megamix 4.0b

    Cooler Sonic in Sonic 3 & Knuckles

    Cooler Sonic in Sonic 3 & Knuckles

    Kirby's Adventure (USA)

    Kirby's Adventure (USA)

    Knuckles' Chaotix (Europe)

    Knuckles' Chaotix (Europe)

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

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

    Super Mario All Stars NES

    Super Mario All Stars NES

    Wario Land 3 (World) (En,Ja)

    Wario Land 3 (World) (En,Ja)

    Top Gear (USA)

    Top Gear (USA)

    Dragon Ball Z - Supersonic Warriors (K)(ProjectG)

    Dragon Ball Z - Supersonic Warriors (K)(ProjectG)

    Smash Remix 1.3.0

    Smash Remix 1.3.0

    Tetris (USA)

    Tetris (USA)

    Silent Hill

    Silent Hill

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

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

    Castlevania - Symphony Of The Night

    Castlevania - Symphony Of The Night

    Yu-Gi-Oh! - Forbidden Memories

    Yu-Gi-Oh! - Forbidden Memories

    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.