I'm about halfway through Isolation now and it's just incredible. The atmosphere is gripping, the visuals are staggering and the tension is unbelievable. I spent 25 minutes hiding under a table biding my time just to go to a door 10 yards away! The save points are scattered around the ship so getting to one feels like a massive achievement and makes you play really cautiously. Haven't experienced this much fear and horror since the early Resident Evil games.