Alien Isolation lasts for about 15 hours, although stealthy players can sneak their way through the story at a much brisker pace.
The Creative Assembly lead game designer Gary Napper told The Angry Joe Show : "The game's actually about 15 hours long because we've got so much to do with the narrative and all the different mechanics of the alien.
"On top of that we have the other threats about the station, we have a big long story that folds out. Also it's a bit like a Metroidvania game where you have a linear story you go through but you can also go back and explore areas you've been to. You can go back to areas and find new things, explore and open up new areas. There's a lot to do in the world.
"The difficult thing is nailing a time because people can play for absolutely ages without even seeing the alien because they're being really careful and really stealthy, they've done nothing to call him down or there have been no explosions that he has come to investigate. Those people can get through it fairly quickly."
As CVG wrote in its E3 Alien Isolation preview, the Xenomorph which stalks you ominously throughout the game is not your only enemy aboard the Sevastopol space station - humans and androids are also a threat.
"While the space station appears completely deserted, other humans - former workers, it seems - still remain and are very much alive. Human encounters are almost as intense as alien ones, in fact, and they offer up a slight moral dilemma because you can't help but sympathise with them."
Sega has confirmed an Alien Isolation release date of October 7 on PC, PS3, PS4, Xbox 360 and Xbox One.