Open Sonic has been discontinued. We're working on a new project, Open Surge, a free and open-source game & engine with a trademark / IP of our own.

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Welcome!

Open Sonic is an open-source game based on the "Sonic the Hedgehog" universe. It introduces a different style of gameplay called cooperative play, in which it's possible to control 3 characters simultaneously. Unlike most similar games, Open Sonic provides a greater level of interaction between the player and the levels. It's more than just a jump'n'run; the user must come up with some strategy in order to get through the levels.

Open Sonic is available for Windows and Linux. The latest release is 0.1.4 (September 19th, 2010). Main features:

• It's portable! No installation is required!
• Sonic-style physics (360° movement engine)
• Available in 9 languages: English, Portuguese, French, Polish, German, Czech, Dutch, Indonesian, Italian
• 2 levels + innovative items + extras
• You can create your own levels using the built-in level editor
• You can make your own custom items, enemies and bosses using our object scripting system
• MODdable capabilities
• Good performance even on old computers*

Check out the source code!

 

The code of this game is licensed under the GPLv2 (the gfx/sfx are not). This game is not endorsed, produced or affiliated with Sega, or any of its subsidiaries. Sega did not make this. This is a non-profit unofficial fangame based on the "Sonic" universe and should be categorized under the same criteria as fanart or fanfiction. The creator of this game is not liable for any and all damages you incur while playing. Sonic, Tails, Knuckles, Eggman, and all related characters, objects and locations are property of their respective owners. All other copyrighted characters contained within belong to their own respective companies and organizations.