My friends introduced me to this little horror game that's kinda interesting. Basically the only thing you do is go down levels in this brick-walled corridor. I don't wanna spoil anything, because it's best to just experience this kinda stuff yourself. If you're into some horror in your video games, give it a try.
As far as I know this is the newest build of the game: http://www.mediafire.com/?54p57z53e12g8mb