Unreal Tournament: 3 Open Source Clones Compared
SurrealEngine is attempting a direct reimplementation of Unreal Engine 1 to run the actual Unreal Tournament (99) using its original game data, but its status here is unplayable. Alien Arena is a separate, complete game that borrows some of the same movement conventions (strafejumping, dodging) but uses its own original setting, weapons, and assets rather than reproducing Unreal Tournament directly, and it ships ready to play with 23 levels included.
Comparison table
Availability
- Status
- Unplayable
- Platforms
- Linux, OSX, Windows
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Active
- Last updated
- 1d ago
- Stars
- 1,102
- Contributors
- 19
Compatibility
- Requires original assets
- YesOriginal copies of Unreal or Unreal Tournament 99 game data files are required to run the game.
- Modding support
- —
- Multiplayer
- —
Availability
- Status
- Playable
- Platforms
- Linux, Windows
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Active
- Last updated
- 4d ago
- Stars
- 40
- Contributors
- 18
Compatibility
- Requires original assets
- NoShips with its own game data including 23 levels, textures, sounds, and maps.
- Modding support
- YesSupports mutators and custom game rules; players can customize game experience with various modifiers.
- Multiplayer
- Online, Capture The Flag, All Out Assault, Tactical
Availability
- Status
- Playable
- Platforms
- TI calculator
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Not tracked
- Last updated
- Not tracked
- Stars
- Not tracked
- Contributors
- Not tracked
Compatibility
- Requires original assets
- —
- Modding support
- —
- Multiplayer
- —
| Title | SurrealEngine | Alien Arena | Arena 3D |
|---|---|---|---|
| Status | Unplayable | Playable | Playable |
| Platforms | Linux, OSX, Windows | Linux, Windows | TI calculator |
| Play in browser | No | No | No |
| Mobile | No | No | No |
| Project health | |||
| Development status | Active | Active | Not tracked |
| Last updated | 1d ago | 4d ago | Not tracked |
| Stars | 1,102 | 40 | Not tracked |
| Contributors | 19 | 18 | Not tracked |
| Compatibility | |||
| Requires original assets | YesOriginal copies of Unreal or Unreal Tournament 99 game data files are required to run the game. | NoShips with its own game data including 23 levels, textures, sounds, and maps. | — |
| Modding support | — | YesSupports mutators and custom game rules; players can customize game experience with various modifiers. | — |
| Multiplayer | — | Online, Capture The Flag, All Out Assault, Tactical | — |
| Preview | | |
Frequently asked questions
Are the Unreal Tournament 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 Unreal Tournament to play these clones?
Alien Arena runs standalone, no original files needed; SurrealEngine requires original game assets to play.
Which Unreal Tournament clone is the most actively maintained?
SurrealEngine and Alien Arena 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 Unreal Tournament.