At first, it's just one or two grunt soldiers coming at you. In the middle are various meagre cover points and a few little cul-de-sacs where you can hunker down and scope out the bad guys, who will spawn from several areas, including inside the sat-base.Įach wave is themed, and they get progressively more challenging.

On one side of the map, there's garage-like building dug into the hillside, and the other a slowly rising incline. The map I tried (there are apparently a range of Survival environments to test yourself against) is called Dome, and it's set in and around a – yes – dome-like satellite station. It looks as though MW3 is going to build on that recipe, and at E3, Infinity Ward and Sledge Hammer were showing off a new Spec Ops mode, 'Survival' – a sort of Horde variant in which a duo of players must survive through wave after wave of enemy attacks.

The 'Spec Ops' option was Modern Warfare 2's nice little surprise – a range of challenging, self-contained co-op missions based around maps from the campaign.