I don't remember which one that is.
One of them if I remember right was about a tribe of aliens, an actual Alien, and a crashed human survivor.
But I don't remember if it was Alien or The Alien (or if it is actually either one of them).
I'd say Stronghold is probably my favorite. Then Alchemy. I'd have to throw Genocide up there as well, it is pretty formulaic with flat characters, but I read the shit out of it when I was a kid.