Halo Wars, Killzone 2 Demos Available Today

In the demo, players will be able to play the first two campaign missions and the Skirmish mode on one of the 14 multiplayer maps.

You'll be able to explore two sections from the opening level, and try out the tutorial. The full game is out on 27th February, and it's a corker - read our review to find out why.

Story may not the game's strongest suit, but all that's really required is enough information to keep you pressing ahead through the military campaign that makes up the single-player missions. Each stage flows into the next and, apart from a couple of deviations from form involving a gun turret and a mech suit later in the game, the goal is clearly to create a tense, claustrophobic experience that convinces you that you're pushing into hostile alien territory, one bloody, dusty inch at a time.