Supreme Commander: 2 Open Source Clones Compared
Beyond All Reason and Zero-K are both RTS games built on descendants of the Spring engine, a detail not captured in any structured field here: Beyond All Reason runs on Recoil (a Spring-engine fork) with a companion Chobby lobby app, while Zero-K runs on Spring itself and, per its own README, ships only the game module in this repository — no engine, tools, or artwork. Both are normally obtained as full downloadable applications through a separate lobby/launcher rather than built directly from these repositories.
Comparison table

Availability
- Status
- Playable
- Platforms
- Linux, Windows
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Active
- Last updated
- today
- Stars
- 4,207
- Contributors
- 344
- License
- —
Compatibility
- Requires original assets
- NoThe game is built on the Recoil RTS engine with its own assets; no original game data is required.
- Modding support
- YesSupports custom Lua game code through mod directories ending in .sdd; developers can create and share custom rulesets.
- Multiplayer
- Online

Availability
- Status
- Playable
- Platforms
- Linux, Windows
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Active
- Last updated
- 1d ago
- Stars
- 827
- Contributors
- 154
- License
- GPL-2.0
Compatibility
- Requires original assets
- —
- Modding support
- —
- Multiplayer
- Online
| Title | Beyond All Reason | Zero-K |
|---|---|---|
| Status | Playable | Playable |
| Platforms | Linux, Windows | Linux, Windows |
| Play in browser | No | No |
| Mobile | No | No |
| Project health | ||
| Development status | Active | Active |
| Last updated | today | 1d ago |
| Stars | 4,207 | 827 |
| Contributors | 344 | 154 |
| License | — | GPL-2.0 |
| Compatibility | ||
| Requires original assets | NoThe game is built on the Recoil RTS engine with its own assets; no original game data is required. | — |
| Modding support | YesSupports custom Lua game code through mod directories ending in .sdd; developers can create and share custom rulesets. | — |
| Multiplayer | Online | Online |
| Preview | ![]() | ![]() |
Frequently asked questions
Are the Supreme Commander 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.
What license do these Supreme Commander clones use?
Zero-K (GPL-2.0).
Do I need to own the original Supreme Commander to play these clones?
Beyond All Reason runs standalone, no original files needed.
Which Supreme Commander clone is the most actively maintained?
Beyond All Reason and Zero-K are currently under active development, based on recent commit activity. See the "Development status" row above for every clone's current status.
See the full write-up for each clone, or go back to Supreme Commander.