I've been playing Dead Space, and it rules. The great sound and superb panoramic visuals make this game very immersive.
It's got its faults thougfh. For one, the camera view is somewhat tricky as the perspective is constantly obstructed by the protagonist,making gameplay a bit clumsy at times, but I got used to it after a while. The controls scheme also took some adjustment time since it's impossible to bind the basic movement commands to the arrow buttons.(one of the consequences of poor porting from the consoles?) Apart from that, it's great. Good pacing and suspense make it quite engaging.