Day of Defeat: Source is a team-based multiplayer first-person shooter game.
Half-Life: Visitors Project Team
Half-Life Visitor puts you in the shoes of a visitor in Black Mesa.
Half-Life Invasion Team
After Half-Life, enter Invasion, its single-player mod.
Makslane Araujo Rodrigues
Game Editor Pro is a game creator that lets you create small 2D games easily.
Fried Okra Games
Half-Life 2 CTF has all the fun you expect from a Capture The Flag game.
A First Person Shooter that delivers a new way to play online games.
I. De Marchi
WPieces is an open source game based on the Chinese game called Tangram.
Neural Networks Research Group
Open source game platform designed for game AI research.
An open source game that tries to convert the popular game Minecraft in 2D.
Miguel Escudero Gestal
Tubularix is an open source game based on the classic puzzle game Tetris.
It is an open source game archive (Quake PAK) unpacking program.
Widely used and well-supported open source game and simulation engine.
Nathaniel Sherry and Matt Lawrence
OpenFracas is a free, open-source game that is similar to Risk.
Killer Kiwis is an open source game where you need to defeat 2 kinds of enemies.
CTools is a free-to-use, open-source game editing package for Windows OS.
Pad Tie is an open source "game pad to keyboard/mouse" application.