A curated list of open source games
- https://www.openra.net - Command and Conquer, and Dune
- https://www.widelands.org - In spirit of The Settlers 2
- https://openttd.org - Reimplementation of Transport Tycoon Deluxe
- https://wz2100.net/ - WarZone 2100, Realtime Strategy that was abandoned and picked up by the OSS Community
- https://www.wesnoth.org/ - Turn-based Strategy roughly comparable to older Heroes of Might and Magic parts
- https://xonotic.org/ - FPS in Spirit of Quake 3 (also based on that engine, lol)
- https://www.flightgear.org/ - Flightsimulator with focus on simulation accuracy