How to Play Zombies / EXTINCTION ( COD Ghost)
SMB Like it! I was very confused at first and I am sure you will be in the act of trying to figure out how to play the new version of zombies in Call of Duty Ghost called Extinction. You must first install the second disc and play the campaign until you reach the point stated in the video (About 12 minutes of gameplay). Then it will be unlocked and available to play. Enjoy killing aliens. Lots and lots of aliens!