UPDATE: Responding to questions about the availability of this character skin pack for those who don't preorder the game, Sega confirmed via the official Alien Isolation Facebook page that both Crew Expendable and Last Survivor will be available to everyone post-release and not limited exclusively to preorders.

The full statement follows below:

It's genuinely been great to see the reaction to The Crew Expendable and Last Survivor pre-order bonus content we announced yesterday and how excited you all are to re-experience those classic scenes from the original movie with our Alien. It's been absolutely amazing for us at the Studio.

However, some of you have been asking if the two pieces of content are only available through pre-order or if we'll be releasing them at a later date as well.

So, I can confirm today that we do plan to release both Crew Expendable and Last Survivor at a later date and we'll have more details for you guys on that shortly.

The original story appears below:

Sega today announced that the preorder bonuses for upcoming sci-fi game Alien: Isolation, the first of which are a pair of mission packs that reunite the cast of Ridley's Scott's beloved 1979 movie, Alien. The content features the voices and likenesses of the movie's actors, including Sigourney Weaver (Ellen RIpley), Tom Skerritt (Dallas), Veronica Cartwright (Lambert), Harry Dean Stanton (Brett), Yaphet Kotto (Parker), and Ian Holm (Ash).

All preorders for Alien: Isolation will be upgraded to the Nostromo Edition, which includes these two mission packs, called "Crew Expendable." In the content, you can play as one of surviving crewmembers (Ellen, Dallas, or Parker) as you explore the Nostromo ship. is possible that this DLC will be sold separately down the road, but right now, Sega is saying the only way to get it is to preorder the game.

"Working with the original cast has been an incredible experience," Alien: Isolation creative director Alistair Hope said in a statement. "It was important to us to have the key original cast members reprise their roles in order to perfectly capture the atmosphere of the movie. For some of the original cast, this is their first appearance in an Alien video game. Seeing them reprise those roles after 35 years was an unforgettable experience."

Further, people in North America who preorder Alien Isolation at GameStop and in Europe at "select retailers" will receive an expansion called "Last Survivor." This content takes place as Ripley attempts to escape on the Narcissus spaceship. "On hearing the screams of Lambert and Parker, players must navigate their way back down through the Nostromo in order to activate the self-destruct sequence, before retracing their steps back to the Narcissus shuttle and their escape," Sega says.

Alien: Isolation, in development at Total War developer The Creative Assembly, launches on October 7 (a busy, busy day for new releases) for Xbox 360, Xbox One, PlayStation 3, PlayStation 4, and PC. A virtual reality demo for the game was on display at E3, but this was just a prototype, Sega said.