Ugh, the "Objective This" star 2 challenge is impossible. My teammates don't to crap, and all the enemies gang up on me before I can do anything! The other challenges are pretty easy though. During actual matches my AI comrades were fairly competent, although I had to haul my ass back to the main objective a few times because nobody would do anything about it. It's not a bad game, but it could REALLY use some work.