I was just thinking, we could make a Xenomorph species and add it to the game, or even create an off shoot mod of it. Or maybe even add it to masterwork. The species would be large, sleath focused with a Tough chitin exoskeleton, a huge barbed tail, claws and a second mouth inside the other mouth which does lethal headbites.. It could have a high velocoty in it's headbite (Because of the piston like nature of the bite)
It could have face huggers, maybe as a pet or even a life stage that only exists to ambush prey. Different types of aliens could spawn depending on who got facehugged, Dwarves could create small but powerful Xenos with a preference for Close combat and hard work.. Oh and Alcohol.
Humans could be the typical, 7 feet tall Xenos. You could have a queen who lays eggs, and the differet life stages of the Xeno.. Drones evolve into warrors(Of each class, like Runners get the charger Xeno when they become Preatorian) so a Runner can be a Drone then a warrior, and then a preatorian but all of it's forms will have it on all fours.
The Xenos could potentially have it's stats be based on the specific character's stats (Or at least it's races trends), Highly intelligent Xenos (Possibly ones derived from an industrial race like the gnomes or an intelligent race like the Elves or Humans) can do basic level crafts of some kind, perhaps hive related or giving face huggers advantages to further the species.