From Destructoid :
"the ship in general is a ton of fun to get lost in -- I felt compelled to just wander around and find extra materials. In fact the game is anything but linear outside of story progression, as you can freely explore areas, return to past zones with new tools, and generally just scavenge around at any time. And you'll need to scavenge, as Isolation feels like an old school survival horror game with regard to item management. At the heart of this mechanic is the crafting system, which lets you build items like flashbangs, medkits, noise makers, and flares. Since the game is so challenging, you'll feel like you need to craft and locate materials, and minor pickups feel like small victories"
http://www.destructoid.com/review-alien-isolation-281651.phtml Glad to know exploration its fun, tense, and necessary