Open source engine projects
Every project in the registry tagged engine, ranked by real GitHub adoption.
Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Li
3D and 2D game engine written in Rust
Rust library to create a Good Game Easily
Solar2D Game Engine main repository (ex Corona SDK)
Biomes is an open source sandbox MMORPG built for the web using web technologies such as Next.js, Typescript, React and WebAssembly.
Simple, Fast, Secure, Flat-File CMS
Feather is a modern Swift-based Content Management System.
Related tags
Frequently asked questions
How many open source engine projects are there?
This registry tracks 7 projects tagged engine, with 39,752 GitHub stars between them. The most-adopted is OpenRA at 17,717 stars.
Are these engine projects free to use?
Yes — 7 of the 7 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which engine project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these engine projects still maintained?
6 of the 7 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.