openOMSI vs OpenRA
openOMSI and OpenRA are both game engine software. OpenOMSI is open source under AGPL-3.0, with 739 GitHub stars. OpenRA is open source under GPL-3.0, with 18k GitHub stars.
Which to pick
- Pick openOMSI when
- You own OMSI 2 and want a 64-bit, multithreaded engine with a modern renderer that keeps your installed mods.
- Pick OpenRA when
- You want to play or mod classic Command & Conquer games on modern systems.
Side by side
A from-scratch Rust recreation of the OMSI 2 bus simulator that loads your existing OMSI 2 maps, buses and mods. It has a launcher, LAN multiplayer, a dedicated server, VR and builds for Windows, macOS, Linux and Android.
A free engine that recreates and modernises classic Westwood strategy games such as Command & Conquer and Red Alert, with online multiplayer and modding.
Early development with expected bugs, and it will not start without a licensed copy of OMSI 2.
Releases are infrequent, with the last stable one in March 2025, and it is GPL-3.0.
Experimental
Production-ready
Desktop app and mobile app
Desktop app
Rust, wgpu, Lua and WebAssembly
C#, Lua, SDL and OpenGL
Open source, AGPL-3.0 (network copyleft)
Open source, GPL-3.0 (strong copyleft)
Use inside your business is unrestricted. If you change it and let customers use it over the internet, you must publish your changes.
Use inside your business is unrestricted, but anything you distribute that includes it must be released under the same license.
739 GitHub stars
18k GitHub stars
New: started 1 month ago, latest release v0.3.45.
Established: started 16 years ago, latest release release-20250330.
Other comparisons
More game engines
Both sides were judged on 2026-11-06 from each project's README and GitHub data. License, age and popularity lines are worked out directly.