The only "threat" DS has is to make you feel overwhelmed by throwing a bunch of enemies at you ala RE4 & RE5 or an invincible enemy that chases you.
As I said, I love the Dead Space games. They are fine action games. DS1 and to a lesser extent 2 start out with a creepy atmosphere that remains for awhile. However, the game quickly runs out of tricks in terms of the scare department. You really start to suspect a necromorph to jump out of another vent or corner. and then it becomes just another action game although a bit "darker" of course.. But yeah, atleast it's closer to RE than RE5...I'll give you that.