So, the game sucks ?
It's frustrating and worrying that nothing remotely good has been made for the franchise since Alien 3, with the exception of the original two PC games, Predators and (to a certain extent) AVP Requiem (it DID have good effects and the aliens atleast moved like they weren't guys in rubber suits, unlike AVP it felt like it was really part of the series) and the various comic book series's, but that goes without saying.
But I will say this, for those of you who are dissapointed: An Aliens game simply does not work unless you have a TONNE of work put into the creatures themselves. They have to act differently, they have to be hard to see, when you do see them they have to be unpredictable, they should be able to work together in groups, the environment has to have a suspenseful atmosphere, they have to blend in with the environment (as they did in the first 3 movies).
So it should really not be such a surprise that this game sucked.