This will be short. There are two sims, where sex with aliens, demons, and hybrids reign supreme. These two sims are Doomed Ship and Necronom. These sims are hives of debauchery and twisted fetishes. Doomed ship will fool you with a beautiful build. Necronom tempts you with a quest system and a Card Duel game, but boil it down and these two sims are fuck houses.
Well built, yes. Good place to RP? No. Look to some other sims for good RP. If you're lookin' to get raped by a beast of hell, have a ball.