Colonize the New World.
A modern, cross-platform Quake game engine based on FitzQuake.
Good-looking and addictive OpenSource games
For exploring cellular automata like Conway's Game of Life.
C64/Amiga emulator with PAL shader and runAhead
3D Engine c++
A cross-platform port of Hexen II game.
4X Space Strategy Game
GemRB is a portable open-source implementation of the Infinity Engine
Multiplatform MIDI File Player for Linux, Windows, and macOS
A MUD client for Android, iOS, Linux, Mac OS X and Windows
WW2 U-boat simulation
Arianne is an engine to develop multiplayer online games like Stendhal
Cooperative multiplayer graphical RPG and adventure game