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Zero Engine

Zero Engine is a 3D game development engine designed by Infinity Ward for use with their majorly successful Call of Duty series. It has been used to develop later installments in the franchise, including Call of Duty: Modern Warfare 2 and Call of Duty: Ghosts. The Zero Engine allowed Infinity Ward to produce more realistic environments, improved character animations, and advanced lighting systems compared to earlier versions of the engine. Its capability for updated visual effects contributed significantly to improving gameplay within the context of modern war themes that are central to many games in the series.