Sonic the Hedgehog
Your own Sonic the Hedgehog ROM, No-Intro '(USA, Europe)' REV00, sha1 6ddb7de1e17e7f6cdb88927bd906352030daa194. REV01 is recognised and runs, and the disassembly reproduces it too with Revision = 1. Nothing is uploaded.
Files are read on this device. They are never uploaded.
About 5 MB. Keyboard and mouse recommended.
The game downloads only after you press Play. Sound starts off.
Controls
| Arrow keys | D-pad |
| Z / X / C | A / B / C (any of them jumps) |
| Enter | Start |
| Gamepad | any standard controller, detected automatically (untested) |
| Touch | EmulatorJS on-screen Mega Drive pad on phones and tablets (untested) |
Sonic 1 has no battery save, and this page keeps nothing in browser storage on purpose — your ROM is asked for again after a reload. Save inside the game before exporting a backup. Clearing browser data can erase progress.