Extinction is a game mode featured in Call of Duty: Ghosts. The game mode features up to four players fighting Cryptids (ancient creatures that have existed before the dinosaurs) in outbreak sites where the Cryptids have overrun the area. Players have objectives, which are to destroy cryptid Hives and complete Challenges.
...that, in Call of Duty: Finest Hour, Lt. Pavelovna hunted a single German officer for at least a day before finally sighting him during the Battle of Stalingrad, and killing him from over a hundred yards away?
...that during the Call of Duty: Finest Hour bonus animation reel, at one point, a horde of rats are seen jumping into the air like rabbits?