I guess I could lift the ban on Unblooded Hunters and such so that Predators can be inexperienced. It could prove an interesting move.
Anyway, as far as enemies... All that you named and much, much more will be experienced in this RP. Colonial Marines from Weyland-Yutani and their Synthetics as well will make an appearance, and so will mercenaries and other strange alien creatures throughout a few new installations which we'll be exploring. Xenomorphs will make an appearance as well, but not for a good while as I don't want to let some of the best enemies make an appearance too early. I'm going to whet your appetite first with a few others which are going to be unique to this RP. The Yautja are going to be a constant presence in the RP, and they will sometimes get in our way because they seek a similar or the same prize, sometimes they will be hunting us specifically which is going to be when the RP becomes its scariest, and sometimes they will be helping us. Yes, you heard right, helping us. That last one won't happen often, but it will happen.
The RP begins in the year 2116. Your character can come from any walk of life. Be it a civilian, scientist, engineer, military personnel, or whatever you can come up with so long as it will have some kind of practical application for interstellar operations.
Now, to give a bit of a spoiler so you know what you're getting into, here are the details surrounding our first mission together
if we all agree to play as humans. As to how such a diversified group comes together, let's just say that all of the individuals involved have special talents or specialities in their field which will all culminate in a "research team" which the UNIC will commission for off-world projects.
Our very first assignment as a unified group is going to be investigating an outer world Colony on the planet LV-229. It's a lush world where Terraforming was kept to a remarkable minimum and was quickly colonized in the year 2107. This world is rich with strange and dangerous indigenous wildlife which is held at bay by a specialized electrified fence about twenty feet high around the Colony.
The Colony, called Aiva's Oasis, reported nearly a dozen scientists and security guards gone missing over the course of a brief three week period. Of those whose bodies were found and recovered, the colony reported that some were skinned, some were decapitated (sometimes missing the entire spine), and others had suffered damage from an as of yet unidentified firearm with a plasma based origin. As to what's causing these strange occurrences, we don't know, but we do know that his problem cannot be ignored.