Open Sonic

Open Sonic Platformer 0:00 0:00

Open Sonic

Developed by Alexandre Martins, WebPort by clarkeadg

A browser build of Open Sonic, the open-source Sonic fan game. Run, jump and spin through classic-style zones.

Open Sonic Unblocked

About Open Sonic

A browser build of Open Sonic, the open-source Sonic fan game. Run, jump and spin through classic-style zones.

Open Sonic keeps platforming honest: tight controls, quick restarts, and levels you can actually beat with practice.

If you like Open Sonic, try Sonic CD, Sonic Mania Plus and Sonic Worlds Next — more platformer games to play next.

You can play Open Sonic unblocked here for free — no download, no sign-up, and it loads straight in your browser on a school Chromebook.

Developed by Alexandre Martins, WebPort by clarkeadg

Is Open Sonic unblocked at school?

Yes. Open Sonic runs entirely in your browser at UBGHyper, so it works on most school networks without downloads, installs, or extensions.

Can I play Open Sonic on mobile?

Open Sonic works in mobile browsers too, though most players run it on a desktop or Chromebook for the best controls.

Do I need to download Open Sonic?

No — Open Sonic loads instantly in your browser tab. There's nothing to install.

Do I need an account to play Open Sonic?

No. Open Sonic needs no login — your favourites and progress are saved in your browser locally.

Does Open Sonic work on a Chromebook?

Open Sonic works on Chromebooks, Windows, Mac and Linux — anything with an up-to-date browser.