Memento for sure. The Game. Maybe 'Primer.' Oh, and 'Los Cronocrimenes' (TimeCrimes, spanish flick).
And 'Delicatessen' (French movie). And 'Jacob's Ladder.' And 'Requiem for a Dream.'
[I like these kinds of movies]
Definitely Requeim for a dream. jacobs ladder too. Thanks for the other movies will definitely watch them.
Seven was a movie that was truly unique and disturbing so was Event Horizon. Meaning to watch caligula but never got around to do so.