I remember when this game came out, a Special Edition version later released for a voucher with big dog for a pair of underwear (as you'd shit yourself the first time playing this game). The only downside I had with this game was the final Alien mission . . . easy to get turned around with the buggers, so hard to get to the exit.
Audio: Excellent mash up from the 2 movies (though veered more towards the Alien side of things). Ambient and creepy as all hell (especially once you get into the Hive's next <shudder>)
Graphics: Great for the time, but the artwork is where it's at, doing the genre a LOT of justice (especially to the Alien(s) side of things).
Game play: Controls are very straightforward, though melee can be a bit awkward sometimes (especially as the Xenomorph). Word of warning, if you are new to the franchise, playing as the Xenomorph can cause dizziness as you're running along walls, ceilings, and air shafts.
Storyline: Not much here . . . Colonial compound for WY Industries, and they have a distinct Hive under their control (then all hell breaks loose). The local Marines are mobilized, and the Predators are there for a bit of sport. "If it bleeds, we can kill it," will be the statement echoing in your mind the entire time (along with "You are one ugly mother fucker," and "Get away from [me] you BITCH!").
Gave this game 5/5 mainly for nostalgia, and the urge to scare myself again . . . wait, did I just hear something in the ventilation shaft? <goes to check>