The definition of survival horror.
Take this how you will, but I am scared of playing ZombiU. Every time I pick up the Wii U Gamepad to start playing, I get a feeling of dread, and worry. Before I start, I carefully consider my last outing in the game, and identify what it is I have to do in order to survive as long as possible. This is a feeling that no horror game has brought up in a long time. While my fear of ZombiU can be seen as a positive or a negative depending on the context of the question, there is no doubt that ZombiU is an achievement in the survival horror genre.