Cube/Nightmare Fuel

The Film Series

 * The main characters wake up in a cube, with a door on every side of the cube, and each door leads to a similar cube. Some cubes contain death traps, which either kill you instantly, or slowly and painfully  . Every method of detecting traps seems to fail at some point, so for a large part of the movie, people are risking a high chance of death every time they enter a room in a desperate attempt to reach food, water, or help.
 * Further disturbing is the fact that the puzzle doesn't have a point: in a discussion, Worth implies that the puzzle isn't part of a grander scheme, that people are being stuck in it because "you either use it, or admit its pointless". So basically, they (and frak knows how many others before and after them) are in this situation because somebody built the cube. That's it, that's the reason. "Because it's there."
 * You wake up in a room, surrounded by strangers who may want to kill you and hundreds of evil deathtraps. And if you don't escape fast, you'll starve to death.

Cube 2: Hypercube

 * "The first one had rules!"
 * The sequel, "Hypercube" is pure nightmare fuel unleaded. Think on it.
 * "Hypercube" had a script that the actual director flushed down the toilet, which had HONF in spades. To iterate:

Cube Zero

 * The character who melts doesn't just get the virus on his skin; he drinks some of it, thinking it's water.