This is the horror movie that defined its decade. Despite being a low budget endeavor James Wan is able to make the most of his resources and deliver a grimy, tensely horrifying experience due to an exceptional script. The way information is revealed throughout the movie is like watching a master class in pacing, constantly uncovering some interesting detail or plot development while maintaining the tension. Completely innocuous sequences become terrifying in this context and the great acting sells every minute of it. The gore is likely to turn off many viewers, but Shayamalan-esque ending cops the lot.

Content warning: gore

Closest comparison: It’s the movie that spawned the escape room craze.

Setting: Grimy Horror
Plot: Thriller Horror
Tone: Slasher Horror