"You've probably heard the basic premise of Dead Space already, but I'll provide a brief synopsis. The game takes place on the USG Ishimura, a mining vessel, which has sent a distress signal and is in need of assistance. A small ship, bearing engineer Isaac Clarke, has been sent to make repairs on the vessel. It quickly becomes apparent that this is more than a routine maintenance request, as the ship has been overrun with a strange and deadly alien threat.
I'm just going to come right out and say it: Dead Space is the scariest game I've played in as long as I can remember. Many of the scares are of the "dogs jump through windows" variety, which might feel cheap in other games. The difference here is that Dead Space constantly works to earn the right to scare you in such a way by maintaining a pervading sense of dread throughout the game. The key to doing this lies in immersion."