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1 definition by Thanksmisfortune

"Source" is the engine that Half-Life 2 and the very popular Half-Life mod, Counter-Strike: Source, runs on. Valve has been working on the Source Engine for several years. This engine includes real-like physics.
Counter-Strike: Source and Half-Life 2 are run by the Source Engine.
by Thanksmisfortune August 08, 2006