Summary: I got this game for 7 dollars..several years after it came out. I really enjoyed it, dispite some very average professional reviews. If you love the aliens and predator universe, you will love this game! The only weak part of the campaign is the areas where you play as an alien.
Summary: This game is extremely fun and addictive. I have played and beat all 3 campaigns which were all awesome and sometimes creepy. As a marine you have got to stay on your toes, never know when those damn Aliens or Facehuggers can pop out at you. You get a 18 round Semi auto pistol to start off with which can be a decent weapon when low on ammo but not accurate at longer ranges (as one can expect from handguns).
Summary: Amazing graphics and detail--effects like the Predator's heat vision are faithfully reproduced. The gameplay isn't great, esp the laughably low accuracy of most of the Marine's guns, but I'm glad I picked this one up. Can't speak for multiplayer as I haven't tried it yet.