Treyarch Engine - 2008

Treyarch Engine is a game engine developed by Treyarch, first used in Call of Duty: World at War. Based on IW 4.0.
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Treyarch Engine
Call of Duty: World at War - 2008
Call of Duty: Black Ops - 2010
Call of Duty: Black Ops II - 2012
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Treyarch Engine 2.0 (2015)