Activision have revealed a new four-player co-op mode in Call of Duty: Ghosts, called Extinction. The new mode sees a group of up to four players taking on aliens and defending their base from the extra terrestrials. It’s also class-based and players will level up as they progress.
Activision have described the new mode as: “An all-new 1-4 player cooperative game mode featuring a unique blend of fast-paced survival action, FPS base defence, scavenging and class levelling.”