Even more impressive is the quality of AI apparent, even in our relatively incomplete demo. If you're used to the shop dummy enemies of games like Half-Life 2 - you know the ones, happy to stand around looking nonplussed while you empty a round of bullets into their heads - prepare for a serious wakeup call. The Chimera are tough and won't miss a single opportunity to duck, weave or retreat in the face of opposition. Similarly, you'll need to keep your wits firmly about you in the more labyrinthine areas of the game, with foes routinely using cunning to flank or simply ambush your squadron if you don't stay alert at all times. Needless to say then, Resistance is hard - infuriatingly, hair-tearingly difficult but always fair - it's a game that demands you become a better soldier, learning the intricacies of your arsenal if you want to survive to the end. Of course, the upside here is that Resistance is relentless in terms of tension and, frankly, that's the way we like our FPSs.