Recently id Software released the source code for Doom 3:BFG edition, thought it was a good thing to make a mirror of their source codes.

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Tags: doom, GAMEMAKER, id, mod, open, quake, software, source, wolfenstein

Ri-li is an arcade game licensed under the GPL (General Public License). You drive a toy wood engine in many levels and you must collect all the coaches to win. You can play on Linux, Mac OsX, Windows and AmigaOS4.

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Tags: arcade, kids, li, LINUX, MAC, open, rail, ri, source, toy, train

Zero-K is a FREE, multiplatform, open-source RTS game. It aims to be dynamic, action-packed and hassle-free, full of clever strategies and constantly moving combat with games lasting an average 20-30 minutes.

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Tags: open, RTS, source, Zero-k

Pocket Island is a HTML5 game developed by Wooga, playable on browsers and mobile device, the source code is available.

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Tags: code, facebook, GAMEMAKER, html5, Island, magic, open, pocket, source, wooga

Do you remeber Nexuiz? The first version of the game was released in 2005. Development continued with many online contributors over the years, with version 2.5 released in October of 2009. In mid-2010 it was announced that a new XBLA, PSN, and Steam downloadable remake of Nexuiz would be done from the ground up by IllFonic using Crytek’s highly anticipated CryENGINE3 game engine.

You can play the Nexuiz on Steam for free this weekend.

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Tags: ACTION, FPS, frag, Free, multiplayer, nexuiz, open, quake, source, xonotic

Since July 20th, Heroes of Newerth has become Free-to-Own, with all heroes released becoming free for all players.

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Tags: dota, hero, heroes, newerth, open, s2, savage

A unique platformer with exploration, RPG and shooter elements set in a huge and hostile underground world.

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Tags: ACTION, arcade, beta, DEMO, minecraft, multiplayer, open, PLATFORM, platformines

FlightGear is an open-source flight simulator. It supports a variety of popular platforms (Windows, Mac, Linux, etc.) and is developed by skilled volunteers from around the world. Source code for the entire project is available and licensed under the GNU General Public License.

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Tags: aircraft, airport, flight, fly, gear, open, simulation, source

Eternal Lands is a free MMORPG (massively multiplayer online role playing game) set in a medieval fantasy world, with both historic elements – such as medieval architecture and weaponry – and fictional elements, such as other humanoid races and magic. In-game activities include exploring 39 different outside maps (plus numerous insides and caves), questing, worshiping gods, socializing with other players, player killing, and improving skills by fighting, gathering resources, and creating items.

For Windows, Linux and Macintosh. Source code available.

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Tags: Eternal, Lands, MMO, open, RPG, runescape, source

Seven Kingdoms Ancient Adversaries was open sourced under the GPL in 2009. This includes the game source code, graphics, and audio, the music is usable ONLY while playing the game. 7kfans are a group that is currently developing an updated version of the game. Seven Kingdoms is a real-time strategy (RTS) computer game developed by Trevor Chan of Enlight Software. The game enables players to compete against up to six other kingdoms allowing players to conquer opponents by defeating them in war (with troops or machines), capturing their buildings with spies, or offering opponents money for their kingdom. The Seven Kingdoms series went on to include a sequel, Seven Kingdoms II: The Fryhtan Wars. In 2008, Enlight released a further title in the Seven Kingdoms series, Seven Kingdoms: Conquest.

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Tags: 7k, 7kaa, chan, diplomacy, fans, gpl, kingdoms, open, RTS, seven, source, trevor