ah, I thought u'd like the game once u played it DD. It's a great representation of the classic movies, & really gives u that great "feeling" that u get from watching the earier predator & alien movies. I, myself got the game a few years back, & have been loving it ever since, although I think I was lucky to find a copy of it in the first place. It's quite tricky to get a hold of nowadays if u just go from shop to shop looking for it, so I'd suggest going to EB games (or other reliable game shop) & asking them to order u in a copy, either that or buy it off the internet, & it's very cheap, only around $20 (although when I bought it I payed $50 for the gold edition). If u can find it the gold edition is the way to go, as it contains AVP2, & the primal hunt expansion pack, which features 9 new levels & allows u to play as a predalien in single player, amongst other new characters.
The single player campaign of the game is great, very well thought out, & surprisingly creepy in places if ur playing as the marine. Although I have to say that the predator campaign is the best of the lot, there's no greater thrill than leaping through the trees in the first few levels, swiping into thermal vision, & stalking ur hapless prey below before taking one of their heads off with ur blades & letting out the signature predator roar, it feels as though ur actually taking place in the first pred movie, but from the pred's POV, nothing beats that.
Multiplayer is great for the main reason that u can fight each other as both of the infamous killers themselves, along with the marines & corporates. Stalking ur prey is made twice as exhilarating when u rush up behind them & take their head off, only to hear "ah d@mnit, that was a cheapshot" from some noob, lol. The only bad aspect of AVP2's multiplayer is the somewhat clunky combat system & poor collision detection. In most fights, u will simply be strafing & jumping like a madman, while firing/swinging ur weapon wildly into the air in the hopes of hitting ur prey, & fights can occasionally become frustrating, as ur ploughed through by that same runner 5 times in a row because u can barely tell where he is due to the sketchy combat system which often c fights to boil down to "I think I hit him" sort of standoffs, as opposed to a good solid fight, which u rarely get.
Overall though, it is a great game, & defenintly worth buying, especially since it's so cheap. There is no better alien or predator game out there right now that can deliver the kind of thrills, excellence, & that same great feeling that u get from watching the classic movies. It's a must buy.