A free/open source client and automation tool for Ragnarok Online
Create custom themes for the Nintendo Switch
The ioquake3 community effort to continue supporting/developing id's
An OpenGL RTS game engine written in C
The flexible game engine
An Open Source DOS emulator to run old DOS games
SDL library for Android, including several games.
RTS game with the theme of Strategy by Design
A planetarium software that shows a 3D simulation of the night sky
Cooperative multiplayer graphical RPG and adventure game
Let it snow on your desktop
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Hardcore 3D space shooter with spaceship upgrade possibilities.
A cross-platform chess game.
A fun realistic multiplayer free-and-open-source first-person-shooter!
Open source FPS/RTS Game