The worst kind of sequel This movie adds nothing new to the Alien universe. This makes it the worst kind of sequel; one that re-uses old ideas from the old Alien movies, which we've already seen, in order to please the crowd. They've even, rather shamelessly, added a bizarre, CGI generated version of the recently deceased actor Ian Holm's character from the first Alien movie.
So what's left? Well, the action scenes are okay but very repetitive (doors closing, characters getting stuck on opposite sides of the glass, air-locks, buttons not working, we have to go back to get him, "No, let's continue" etc.). The acting is just horrendous.
They also do something which in this case is unforgivable. They forget the defining characteristic of the Alien, it's intelligence. That's what makes it interesting. In this movie, the Aliens are running head-first into cannon fire, launching themselves towards death.
This movie does not deserve to be an Alien movie as it does not consider the legacy.