Not sure its a 9.0
User Rating: 8.4 | Perfect Dark Zero X360
I dont think the game deserves its 9.0 rating but its also not like a 7. This game has some great multiplayer especially with the downloadable content allowing bots into dark-ops which makes infection the best gametype in this game. I think they should have added more single player achievements rather than having everything so you have to beat the game on 4 difficulties. I love getting achievements and when you dont have xbox live (my account expired) it can make getting some achievements difficult because playing with bots to 100 flag captures is boring. The maps are to easy to get lost in on single player. If that arrow on the ground wasnt there i would have probably never beat the 4th level or something. Its not that i dont like wandering around but its no fun when you have to find an object the size of a keycard. 
