"A few weeks ago Alien Isolation scared the bejesus out of me, and for the most part I really enjoyed the experience. While some critics were less than enthused or outright frustrated, I felt that the game was just long and tense enough without wearing out its welcome. That said, I don’t think Alien Isolation is a formula you can extend too much before it gets stale. Horror just isn’t something you can repeat ad-nauseum like a shooter; it takes a careful balance of elements that, for better or worse, have a relatively short shelf life. So how do you extend a game like Alien Isolation with DLC?
Creative Assembly’s answer is to add more levels to the game’s standalone survivor mode. An arcade-style challenge separate from the main story, survivor puts you into smaller levels with time-sensitive objectives, and a stopwatch timer so you can compete against leaderboard scores."