Super Mario Bros.
Boots, lightly testedNES · 1985 · Platformer · Decompilation
The 1985 side-scroller, with every tile and sound regenerated.
Controls
| Arrow keys | move |
| X | A (jump) |
| Z | B (run, fire) |
| Enter | Start |
| Shift | Select |
| Gamepad | any standard controller, detected automatically |
About this build
Super Mario Bros. running in the browser from the retail program, rebuilt from its disassembly, on EmulatorJS (FCEUmm). Every tile, sprite and sound has been regenerated by the clean-room pipeline from coarse facts, so the build ships no original ROM, graphics or audio.
- Built from
- the retail program on EmulatorJS (FCEUmm)
- Type
- Decompilation
- Game files
- No original game files needed.
- Code licence
- See the upstream project and the clean-room repository
- Assets
- Regenerated clean-room assets; no retail data is distributed
- Source
- andrewnakas/smb-cleanroom ↗
What has been tested
Headless Edge: boots to the title, Start begins a 1 player game, runs and jumps through World 1-1; audio buffers carry signal.
Last tested 2026-10-10 in Edge (headless, muted). Full playthrough: not verified. How games are tested.
The build's own test log is in STATUS.md in its repository.
Known limitations
- Work in progress: regenerated graphics and audio differ from the retail game by design.
Saves
The game has no save. Save states are available from the emulator menu.
