AVP is a game that trys to deliver a bit of everything in it's gaming experience and this is carried off quite well.
The problem with taking a fairly broad aproach is that none of it feels exceptional which is where this title falls down.
The graphics in this game are fairly good on the xbox and provide sufficient immersion although nothing awe inspiring.
The Marine part of the game essencially boils down to a pretty average FPS without the punch of the frontrunners of the genre like COD etc.
The Predator part of the game reminded me much of Chronicles of Riddick except with less stealth and less narrative. To me this was the most dissappointing bit as the predator is limited to only 4 weapons and most of the time they're irrelevant because your hammering the right trigger and slashing everything to death that comes near. Don't get me wrong the shoulder cannon and the disk are very good but there should have been so much more.
The Alien part was as good as you could ask for - with no weapons and only meele attacks to worry about the developers created a convincing alien experience. The camera angles can be a bit confusing at first but you get used to it eventually. The experience of sprinting towards an unsuspecting marine along the ceiling in the dark killing them in the most grizzly way the imagination can conjure is quite satisfying indeed.
The single player is entertaining for a while but is really just an overblown tutorial for the multplayer modes which is where the game shines most.
Overall this game is above average and has some great moments but it lacks the quality that makes a game truley great.