Console FPS. You played and liked Killzone, it's not like you've got anything to lose.
Fairly average FPS, shit blows up nice, etc etc.
Expect a fairly shallow plot, enemies from the big old list of FPS cliches, and the usual FPS guns (with a nice surprise or two).
Wouldn't call it awesome, wouldn't call it terrible. It's the sort of game you play, have a moderately good time with, then never touch again. It's also somewhat short, of course... console FPS (it's to be expected)
