(I still need to play Dead Space, though.)
Its quite cheap on steam.
I would murder someone just to experience dead space again for the first time. MURDER!!
The combination of action/ dread/ terror etc is perfect. You hate to continue it, but you also want to know how Isaac's journey ends.
Play it hicks.. You will love it.
2 & 3 aren't my favs, but the first one is gold.