Alien RPG
Yes, I own the book, and have played three sessions, so I know a little bit.
I am up for any scenario, although I might have a slight preference for Hope's Last Day over Chariot of the Gods, just because I prefer the movie Aliens to the movie Prometheus-- the scenarios each broadly reflect each movie.
I have purposefully not read either one so that I can remain unspoiled and be appropriately horrified by my character's shocking death. ;)