Back Source (rekenaarspeletjie-enjin) Afrikaans سورس (محرك لعبة) Arabic Source AST Source (гейм енджин) Bulgarian Motor Source Catalan Source (herní engine) Czech Source Danish Source (Spiel-Engine) German Source Greek Source Esperanto
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| Developer(s) | Valve |
|---|---|
| Initial release | October 2004 |
| Written in | C++ |
| Middleware | Havok |
| Predecessor | GoldSrc |
| Successor | Source 2 |
| License | Proprietary |
Source is a 3D game engine developed by Valve. It debuted as the successor to GoldSrc in 2004 with the releases of Half-Life: Source, Counter-Strike: Source, and Half-Life 2. Valve used Source in many of their games in the following years, including Team Fortress 2, Counter-Strike: Global Offensive, Dota 2, and the Portal and Left 4 Dead franchises. Other notable third-party games using Source include most games in the Titanfall franchise, Vampire: The Masquerade – Bloodlines, Dear Esther, The Stanley Parable and Garry’s Mod. Valve released incremental updates to the engine during its lifetime. Source was succeeded in 2015 by the release of Source 2.