Same as my original Killzone 2 review, proving its lasting greatness:
Great game in all respects for both campaign and online gameplay. The campaign on the easiest setting is a reasonably quick one to power through, but some bosses even on this setting will leave you struggling to beat down. On harder difficulties it becomes the hardest FPS to beat since Halo 2 on legendary.
Online play is immense with up to 32 players on one map, the gun fights quickly become chaotic, leaving a feeling of desperation as both teams struggle to sieze objectives. Combined with this addicting gameplay and several classes to get ribbons/medals for this game will keep you playing for hours beyond you completeing it.