Boring, not so fluid controls and weak graphics
I was instantly turned off by the poor character animations and the overall graphics of the game. I would have played through a little more had the game had better graphics. Controls were not very fluid and the character movements were very clumsy, to say the least. The story line, at least to that point, was not interesting enough to keep me playing, but then again I'm not really into sci-fi type games.
I hated the weapons in the game too. With the first (and second) weapon that you pick up, it seems that you have to unload a full clip to kill an enemy. Coming from CS and BF2, this also seemed weird.