The pre-order bonus for Call of Duty: Infinite Warfare was revealed today courtesy of CharlieIntel. They say that those who pre-order Infinite Warfare will get instant access to a variation of the Terminal map from Call of Duty: Modern Warfare 2.
BREAKING: Preorder bonus announced -- GET TERMINAL FROM MODERN WARFARE 2 to play in #InfiniteWarfare

How is it a "variation" on the original? Well, it now takes place on the moon. This piece of concept art should give you some idea of what to expect. This bonus will be available beginning November 4 through participating retailers for all platforms (PC, PS4, and XB1).

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