The Call of Duty series has been around for quite some time now and has been perfected over time to become what it is today, but it’s hard to image what it could have been before it became the series it is today. well we have just found some pretty interesting information from a recent leaked prototype video for the game before it became what is today showing not so polished graphics alongside some weird yipe aha music upon a mission completion, check that video out above, also let us know in the comments below what you think of the video.

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