Hey everyone I'm new~

Anyway, I'm totally obsessed with horror movies that are played out as a game.. Either as a reality game or involving a game with rules.. And I'm looking for more movies/books like it.

Here's movies I already have seen:

-Battle Royale
-Red Room (the movie, not the flash animation :P)
-My Little Eye
-Series 7: The Contenders
-The Running Man (even though it's not horror :P)
-Cube
-Cube 2: Hypercube
-Cube 0

And some books...:

-The Running Man
-The Long Walk
-Battle royale
-And Then There Were None / 10 little indians

Anyway, if anyone knows of any other movies like this please tell me!

I remember reading about an asian one a long time ago about girls in a maze of some sorts with a murderer chasing them.. anyone know the title of this?