This 'drill' shot suggests that this isn't a simple survival/horde mode, but rather a series of challenges where players must work together to achieve objectives - in this case, correctly placing and defending a drill, presumably to reveal alien hives that need to be destroyed. Several shots show that there's an in-game currency which can be used to make use of the various special abilities, and it seems bonus money is earned according to your performance in a particular round. This first shot shows that there are four different types of soldiers to choose from - tank, weapon specialist, medic and engineer - and each has its own loadout of perks and special abilities that will help both themselves and the team as a whole.

A new game mode, which appears to be called Extinction, swaps Treyarch's shambling hordes of zombies for some Giger-esque aliens in a cooperative, class-based series of missions in which a party of players can take on the xenomorph threat. It seems the upcoming Infinity Ward-developed Call of Duty: Ghosts is also indulging in its own flights of fancy, if a series of apparently leaked screenshots are to be believed.

Is there something you think we should be reporting on? Email Call of Duty series has always primarily been known as a military shooter - the antithesis to the myriad fantastical sci-fi and horror-themed shooters that came before it - but ever since the fifth game, World at War, the Treyarch-developed installments in the series have included their own occasional jaunts into pure fantasy with the addition of a zombie-themed cooperative multiplayer mode.

Call of duty ghost aliens