Super Mario Bros. 3: 2 Open Source Clones Compared
smb3 is a disassembly that reassembles byte-for-byte into the original US SMB3 ROM, intended as a research base rather than a modified game. Super Mario Bros. 3Mix instead is a hack built with the same NESASM toolchain that adds gameplay concepts borrowed from games released after the original SMB3, though the README doesn't specify which ones. Both require supplying your own original SMB3 ROM to build, and neither includes a prebuilt binary.
Comparison table
Availability
- Status
- Playable
- Platforms
- NES
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Halted
- Last updated
- 1y ago
- Stars
- 243
- Contributors
- 3
Compatibility
- Requires original assets
- —

Availability
- Status
- Playable
- Platforms
- NES
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Halted
- Last updated
- 9y ago
- Stars
- 39
- Contributors
- 2
Compatibility
- Requires original assets
- YesHack/mod of Super Mario Bros 3 that requires the original ROM to build.
| Title | smb3 | Super Mario Bros. 3Mix |
|---|---|---|
| Status | Playable | Playable |
| Platforms | NES | NES |
| Play in browser | No | No |
| Mobile | No | No |
| Project health | ||
| Development status | Halted | Halted |
| Last updated | 1y ago | 9y ago |
| Stars | 243 | 39 |
| Contributors | 3 | 2 |
| Compatibility | ||
| Requires original assets | — | YesHack/mod of Super Mario Bros 3 that requires the original ROM to build. |
| Preview | ![]() |
Frequently asked questions
Are the Super Mario Bros. 3 clones on this page open source?
Yes — every clone catalogued here is an open-source project. Availability, license, and development-status details for each one are listed in the comparison table above.
Do I need to own the original Super Mario Bros. 3 to play these clones?
Super Mario Bros. 3Mix requires original game assets to play.
See the full write-up for each clone, or go back to Super Mario Bros. 3.