There's loads of pressure on Killzone 2 – it's the highly-anticipated, big-budget follow-up to a PS2 game that promised much, but fell short of expectation. It's a good job, then, that Killzone 2 has serious 'wow' factor – you get impeccably directed, visceral and violent cutscenes, massive, 7.1 surround sound, and awesome, playable set-pieces.
However, the first half of the game struggles to balance the mix of firing from cover with run-and-gun tactics, suffers from samey environments, and doesn't quite pull you into the story. From Saluman Bridge level, everything starts to fall into place, and the game makes much more sense during the second half. The controls are lacking a little in accuracy and response when compared to the very best first-person shooters, but stick with it and Killzone 2 does (eventually) reward your commitment.