Update: Sega has officially announced Creative Assembly's Alien: Isolation for a release in the second half of 2014. Isolation will be available on PlayStation 4, Xbox One, PlayStation 3, Xbox 360 and PC. We've also added the debut trailer.
Sega and Creative Assembly still haven't budged on whether or not Alien: Isolation is definitely coming, but that hasn't stopped Microsoft from releasing new information and screenshots via the Xbox Live Marketplace. Whoops.