Sonic the Hedgehog 2 (CENSOR prototype)
Sonic the Hedgehog 2 (CENSOR prototype) - Platformer Classic
This is a prototype build of Sonic the Hedgehog 2 for the SEGA Genesis, often referred to as the CENSOR prototype. It was discovered among unreleased development materials and offers a look at an earlier, unfinished version of the iconic platformer. The exact origin and who created this specific build remain unclear, but it shares the same core as the final game released by Sega in 1992.
As in the final game, your goal is to get Sonic from the start of each zone to the end, collecting rings, stomping on badniks, and avoiding spikes and pits. The signature spin dash move is present, letting you build up speed and blast through enemies and obstacles. You can also play as Tails, who follows Sonic in single-player and can be controlled by a second player in co-op. Checkpoints and star posts mark your progress, but the prototype may have different level layouts or item placements.
What makes this prototype worth checking out is the chance to see how Sonic 2 evolved during development. Small differences in level geometry, enemy placement, or even music might catch your eye. It is not a polished experience and may contain bugs or missing content, but for fans of the blue blur or retro game history, it is a fascinating time capsule. Compared to the retail version, it feels rough around the edges, which is exactly the appeal.
How to Play Sonic the Hedgehog 2 (CENSOR prototype) Online
When you first start the CENSOR prototype, you will see the familiar SEGA logo followed by a title screen. Press Start to begin a new game. You will be placed in the first level, likely Emerald Hill Zone, though layouts may differ from the final release. The core gameplay remains the same: run to the right, collect rings for protection, and defeat enemies by rolling into them. Your score and time are displayed at the top.
Keep an eye out for extra lives and shields hidden in monitors. If you get hit while holding rings, they scatter and you drop some; collect them again quickly or you may lose them. If you have no rings and get hit, you lose a life. The game continues until you run out of lives. As a prototype, you may encounter glitches or unfinished elements, but the goal is still to reach the end of each act and defeat Robotnik at the end of each zone.
Sonic the Hedgehog 2 (CENSOR prototype) Keyboard Controls
Controls
- Arrow Keys: D-Pad / Movement
- X: A button
- S: B button
- Z: C button
- A: X button (6-button pad)
- Q: Y button (6-button pad)
- E: Z button (6-button pad)
- Enter: Start / Mode
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