I must say I was looking forward to this game for the longest time, but all it ended up offering are a few extra game mechanics on top of very familiar gameplay. The gravity changing adds a new twist, as does the spirit walking in single-player, but if you've played quake or doom, you've basically played this. As for the weapons, they are a new touch, but aren't that rewarding to fire. In the end, the game gets old somewhat quickly, but it's worth a rent.
when i first put this game in i was weary about playing it. fps have let me down in the past, but this one is an exception. This game excels in almost every aspesct. there are some minor flaws and somw things i would have done different. the flaws are so miniscule, their not even worth mentioning. But i tell you what is the graphic on this game are unreal, or sould i say too real. ive gotten killed a couple of time because i was to busy looking around at the background to notice the hordes of aliens shooting at me. this game is definatally worthin checking out. i gave it a 9out of 10.