I thought Carla was the creepiest boss in this game. I would say Rasklapanje was a bit on the creepy side too, the way they would squeeze out of vents, and then break into three parts going after you when you shoot them a few times.
Carla was really creepy, all the faces on the wall were really unsettling (Especially the first one because I didn't realise it would attack when I got near it). Wish more of the game could have been like that.
I hate religion, but I love Jesus. Official leader of the Illuminati.