Well it is and it isent. It start out like 80s action movies, the soldiers make big talk about wiping out bugs but the Xenos prove to be a far more intelligent, resourceful, unstoppable and deadly foes then they bargained for. They are easily force out of the hive by the Xenos and are constantly being out smarted and outmaneuvered at every turn. It still has action element but at its core its horror.
That's actually something very few writers have ever gotten right in books or comics. They tend to treat the aliens like bugs or at best like the raptors from jurassic park but I don't think that dose them justice. I've always felt that the Xenomorphs level of intelligence is impossible for us to understand because its well alien. They are in a sense like insects in terms of savagery but they sometimes display incredible intelligence beyond that of JP raptors or intelligent mammals. As I've often described it, its a whole other kind of intellect, one we will likely never full understand.
Another aspect to them that is downplayed in other media is their power. They can easily over power humans and sometimes predators with pure strength alone. The worst offence in this area was in my most hated alien book Cauldron where a Xenos are somehow taken down by common earth animals like a bear or a cloned smilodon. Don't get me wrong Xenos fighting animals is a nice change of pace but I find it hard to believe that they would go down that easily. Compare that to one of my favorite books Music of the Spears where the worst a Xeno gets is a minor wound from a charging Bull but then rips its head of with a little help from its tail and a few minor, superficial scratches and bites from a panther, Also somehow in Cauldron said bear and and sabertooth seem hardly put out when they get splashed with acid! You know the stuff we've seen eat through metal in second!
An a side note more alien types
Gorilla Alien!
Shark Alien!
Ox Alien!
T. Rex Alien!
Na'vi Alien!
Engineer/Jockey Alien