There Is a Hell. This Is Worse.

In the middle of a routine patrol, officer Daniel Carter happens upon a blood-soaked figure limping down a deserted stretch of road. He rushes the young man to a nearby rural hospital staffed by a skeleton crew, only to discover that patients and personnel are transforming into something inhuman. As the horror intensifies, Carter leads the other survivors on a hellish voyage into the subterranean depths of the hospital in a desperate bid to end the nightmare before it's too late.
The Void keeps every mind human — it fights its subject at zero distance. The story fights on E8/E9 of the E0–E14 reality ladder, compressing cult, death, transformation, survival.
Films fighting at the same level of reality, about the same things.
Other films that change a standing rule of their world — ranked first by those bending it at the same rung.
The Return of the Living Dead (1985)alters at E6 · same rung · loose
Help! I'm a Fish (2000)alters at E6 · same rung · loose
Maze Runner: The Scorch Trials (2015)alters at E6 · same rung · loose
Beetlejuice (1988)alters at E6 · same rung · loose
Shaun of the Dead (2004)alters at E6 · same rung · loose
War for the Planet of the Apes (2017)alters at E6 · same rung · rigorous