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A game engine is a software framework designed for the creation and development of video games. Developers use them to create games for consoles, mobile devices and personal computers.
IW engine. The IW engine is a game engine developed by Infinity Ward, Treyarch, and Sledgehammer Games for the Call of Duty series. The engine was originally based on id Tech 3 as its core, since the engine itself is proprietary with inclusion of GtkRadiant by id Software. It has been used by Infinity Ward, Treyarch, Raven Software, and Sledgehammer Games.