CorsixTH is an Open source clone of Theme Hospital. ...more

Manic Digger is a 3d block-building game, a Minecraft clone. ...more

Voxelands is a free voxel world game. ...more

The Mana World is a free 2D open source MMORPG. ...more

Alien Arena is a fast, free FPS deathmatch game. ...more

Nikki and the Robots platformer game. ...more

Unvanquished is an opensource first-person strategy shooter game. ...more

Tremulous is a free and open source team-based first-person shooter with real-time strategy elements. ...more

TORCS (The Open Racing Car Simulator) is an open source 3D car racing simulator available for Linux, FreeBSD, Mac OS X, AmigaOS 4, AROS, MorphOS and Microsoft Windows. ...more

Frets on Fire is a free, open-source Finnish music video game. ...more

NetHack is a single-player roguelike video game. ...more

Tanks of Freedom is a classic turn-based strategy game with two armies fighting against each other. ...more

Secret Maryo Chronicles (SMC) is a free, open source two-dimensional platform game. ...more

MegaGlest is a free and open source real-time strategy computer game in a fantasy world, mixing elements of re-imagined past civilizations, magic and steampunk. ...more

Simutrans is a cross-platform simulation game in which the player strives to run a successful transport system by constructing and managing transportation systems for passengers, mail and goods by land, air and water between places. ...more

StepMania is a cross-platform rhythm video game and engine. It was originally developed as a simulator of Konamis arcade game series Dance Dance Revolution, and has since evolved into an extensible rhythm game engine capable of supporting a variety of rhythm-based game types. ...more

Gnomescroll is an open source multiplayer voxel game. ...more

Pixel Dungeon is a traditional roguelike game with pixel-art graphics and simple interface. ...more

Warsow, also stylized as War§ow, is an open source first-person shooter video game. ...more

Agar.io Clone is a clone of the agar.io game that uses a quadtree for collision testing and canvas layering. ...more

Widelands is a free slow-paced real-time strategy video game under the GNU General Public License. ...more

AssaultCube (ActionCube) is a free and open source software first-person shooter video game. ...more

Nexuiz is a multiplayer first-person shooter. It is distributed under the GNU General Public License (GPLv2). ...more

Red Eclipse is a fun-filled new take on the first person arena shooter, built as a total conversion of Cube Engine 2. ...more

Hedgewars is a free and open-source turn-based strategy artillery game. ...more

Warzone 2100 is an open-source real-time strategy and real-time tactics hybrid computer game. ...more

Freeciv is a single, and multiplayer, turn-based strategy game for workstations and personal computers inspired by the proprietary Sid Meiers Civilizationseries. ...more

OpenArena is a free and open-source video game, it is first-person shooter (FPS) and a video game clone of Quake III Arena. ...more

Teeworlds is a free, open source sidescrolling multiplayer shooting game. ...more

SuperTuxKart, also known as STK, is a free and open-source kart racing video game, distributed under the terms of the GPLv3+. ...more