Duke Nukem II: 2 Open Source Clones Compared
Duke 2 Reconstructed is a reconstruction of the original source code meant for documentation, preservation, and DOS source mods — its own readme states it compiles to a binary identical to the original and points players who just want to play the game on modern systems to Rigel Engine instead. Rigel Engine is that modern reimplementation: a drop-in replacement that runs natively on current systems, adds modding support beyond the original game, and requires the original game's data files to run.
Comparison table

Availability
- Status
- Playable
- Platforms
- Windows, Linux, OSX, Web
- Play in browser
- YesPlay in Browser
- Mobile
- No
Project health
- Development status
- Halted
- Last updated
- 2y ago
- Stars
- 1,004
- Contributors
- 19
- License
- GPL-2.0
- Engine
- SDL2
Compatibility
- Requires original assets
- YesGame data files from the original Duke Nukem II are required to run.
- Modding support
- YesExtended modding features are supported beyond the original game.

Availability
- Status
- Playable
- Platforms
- DOS
- Play in browser
- No
- Mobile
- No
Project health
- Development status
- Halted
- Last updated
- 1y ago
- Stars
- 367
- Contributors
- 2
- License
- GPL-2.0
- Engine
- —
Compatibility
- Requires original assets
- NoThe reconstructed source code compiles to a binary identical to the original DOS executable; original game data is not mentioned as a requirement.
- Modding support
- —
| Title | Rigel Engine | Duke 2 Reconstructed |
|---|---|---|
| Status | Playable | Playable |
| Platforms | Windows, Linux, OSX, Web | DOS |
| Play in browser | YesPlay in Browser | No |
| Mobile | No | No |
| Project health | ||
| Development status | Halted | Halted |
| Last updated | 2y ago | 1y ago |
| Stars | 1,004 | 367 |
| Contributors | 19 | 2 |
| License | GPL-2.0 | GPL-2.0 |
| Engine | SDL2 | — |
| Compatibility | ||
| Requires original assets | YesGame data files from the original Duke Nukem II are required to run. | NoThe reconstructed source code compiles to a binary identical to the original DOS executable; original game data is not mentioned as a requirement. |
| Modding support | YesExtended modding features are supported beyond the original game. | — |
| Preview | ![]() | ![]() |
Frequently asked questions
Are the Duke Nukem II 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 Duke Nukem II clones use?
Rigel Engine and Duke 2 Reconstructed (GPL-2.0).
Do I need to own the original Duke Nukem II to play these clones?
Duke 2 Reconstructed runs standalone, no original files needed; Rigel Engine requires original game assets to play.
Can I play any of these Duke Nukem II clones directly in a browser?
Yes — Rigel Engine has a browser-playable build linked in the comparison table above, no install required.
See the full write-up for each clone, or go back to Duke Nukem II.