The film (penned by future «Avengers» helmer Joss Whedon, though he's mostly disowned the finished product) sees Ripley resurrected 200 years on as
a part xenomorph - clone who clashes with a group of mercenaries and scientists determined to bring back the creatures.
The graphics are a little bit dated, and yes the marines can block the Alien /
Xenomorph attacks and a few sounds ands animations aren't right (mainly marine) the predator and Alien gameplay make up for a the
parts of the game where the marine didn't do it.