The game delivers a solid experience in single-player mode. Can't say the same for multi-player. I gave this game an 8 for single-player.
The levels are nice and large. The gameplay is easy and fluid. I haven't played many 3rd person shooters lately, but this was easy to get into.
The story line was rich with content, although, to me, it got old fairly quick. You seem to find a lot of 'relics' that have no real reason for being in the game.
My main gripe with the game is that the bosses seem robotic. The main antagonist in the game was way to easy to beat - using a fighting mode where you just wait for buttons to flash on the screen, then press them. Might as well just make it a cinematic sequence if you're going to cop out on gameplay that much.