The flexible game engine
A free and open-source Touhou Project fangame
An Open Source DOS emulator to run old DOS games
A very efficient tutor.
A planetarium software that shows a 3D simulation of the night sky
Write programs in assembly that battle each other in Corewar
An Ubuntu remix for both new and experienced Linux sophisticates
General Purpose Engine for Graphic Adventures.
A modern, cross-platform Quake game engine based on FitzQuake.
Cooperative multiplayer graphical RPG and adventure game
0 A.D. is a free, open-source, cross-platform real-time strategy game.
LDraw™ editor for LEGO® style digital building instructions.
A cross-platform port of Hexen II game.