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Source (game engine)
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<p>Source is a 3D <a href="/facts/Game_engine/lojx7lTG">game engine</a> developed by <a href="/facts/Valve_Corporation/zlRE5vJL">Valve</a>. It debuted as the successor to <a href="/facts/GoldSrc/3L5U1lpX">GoldSrc</a> in 2004 with the releases of <i><a href="/facts/Half-Life%3a_Source/hPAqs2gY">Half-Life: Source</a></i>, <i><a href="/facts/Counter-Strike%3a_Source/Pm3YfVRt">Counter-Strike: Source</a></i>, and <i><a href="/facts/Half-Life_2/Ge9wJwK3">Half-Life 2</a></i>. Valve used Source in many of their games in the following years, including <i><a href="/facts/Team_Fortress_2/Ta3QvNeE">Team Fortress 2</a></i>, <i><a href="/facts/Counter-Strike%3a_Global_Offensive/dLb5NQrJ">Counter-Strike: Global Offensive</a></i>, <i><a href="/facts/Dota_2/BD8DugTD">Dota 2</a></i>, and the <i><a href="/facts/Portal_(series)/eRpWL3cG">Portal</a></i> and <i><a href="/facts/Left_4_Dead_(franchise)/wSMXuwxg">Left 4 Dead</a></i> franchises. Other notable third-party games using Source include most games in the <i><a href="/facts/Titanfall/Bu89Lpab">Titanfall</a></i> franchise, <i><a href="/facts/Vampire%3a_The_Masquerade_%25E2%2580%2593_Bloodlines/9GMNw9hN">Vampire: The Masquerade – Bloodlines</a></i>, <i><a href="/facts/Dear_Esther/kgK1Mmoy">Dear Esther</a></i>, <i><a href="/facts/The_Stanley_Parable/f47tbRl5">The Stanley Parable</a></i> and <i><a href="/facts/Garry%25E2%2580%2599s_Mod/WyQQp2uf">Garry’s Mod</a></i>. Valve released incremental updates to Source before it was succeeded by <a href="/facts/Source_2/SlVm8Gf9">Source 2</a> in 2015. </p>