RPG Maker 2000/2003 and EasyRPG games interpreter
Multi Theft Auto is a game engine
Free and open source real-time strategy game
A game of dungeon exploration, combat and magic
Doom-based AI research platform for reinforcement learning
Multiplatform MIDI File Player for Linux, Windows, and macOS
FlightGear Flight Simulator: free open-source multiplatform flight sim
RTS game with the theme of Strategy by Design
A free transportation simulator game
A strategy game with a high fantasy theme
Zoomable user interface (ZUI) with file manager, file viewers and more
3D modeler, 3D game maker, 3D demo maker
Action RPG that's easy to mod
C.S.R
Convert PSID and RSID files into C64 executables
Open source FPS/RTS Game
A free 3D game engine to create games and realtimes scenes for Windows
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Cross-platform real-time strategy game (3D)
A 2D multiplayer space shooter game
Modernized traditional finger/hand guessing cricket