I typically don't buy in to preorder DLC, as I think it's an exploitative practice. I might have to make an exception to this one. Alien Isolation will have two preorder DLC missions called Crew Expendable and Lone Survivor, and the best part is that it reunites the original cast.
The missions take place on the Nostromo, during the first film. In Crew Expendable you can play as Ripley, Dallas or Parker as they try to zap the alien out of an airlock. In Lone Survivor you play as Ripley alone, as she sets off the Nostromo's self destruct and tries to get the hell out of there on the Narcissus escape shuttle.
Sigourney Weaver, Tom Skerritt, Yaphet Kotto, Veronica Cartwright and Harry Dean Stanton all reprise their roles. Ian Holm sadly isn't back as Ash, and John Hurt isn't involved as, understandably, his character Kane has already "given birth" to the alien at that point in the story. It's still amazing to have these legendary actors back for Alien's 35th anniversary and I can't wait to sneak around the Nostromo while THE original xenomorph stalks my every move.