But Killzone's recipe for success falls flat once you actually delve into the game, where you'll encounter an array of minor technical issues and an unfortunate lack of overall refinement. It's a functional shooter, but with a couple of extra coats of paint, it could have been a whole lot better.
So yes, there's a lot of variety in the game's backdrops. Unfortunately, there's not such a great range of enemies to fight. The vast majority of your opponents are basic Helghast grunts, occasionally joined by other Helghast grunts who look slightly different and fight with shotguns or rocket launchers rather than the standard-issue assault rifle. This sameness in enemy design isn't utterly damning but doesn't really do much to enliven the action, either.
The shotgun, with its horribly slow rate of fire, is rather ineffectual; the sniper rifle's aiming system is too loose; and the assault rifles are only sporadically accurate (and while this inaccuracy might be realistic, it isn't particularly satisfying). The guns do their killing properly but with little panache.
Unfortunately, a litany of technical problems detract significantly from the experience. Killzone looks great in still pictures, and indeed, it's one of the nicer-looking PS2 games. Until it starts moving, that is. The frame rate is never what you'd call completely smooth, and in some heated battles it can get so low that precise aiming becomes a maddening chore. There's a host of minor graphical issues that don't harm the gameplay but still make the experience feel just plain sloppy. A level-of-detail problem causes friendly character models to get stuck in their low-detail versions even up close--on occasion the high-detail texture and geometry won't pop in until after the person has started talking to you. The character animation is usually serviceable but occasionally causes both friends and foes to move in a stuttery, strange-looking way. Taken individually, these flaws are minor, but the many small problems add up to noticeably affect the visual quality of the game.
In battle, your comrades will sometimes indicate that they're sustaining damage by uttering a particular scream repeatedly, without any variation whatsoever. Similarly, the Helghast soldiers repeat the same muffled battle cries, ad nauseam, in the same muffled, spoken-through-a-respirator tones that will make you crazy over time.
Источник: обзор gamespot.com