Path of Exile is a free diablo-like game, you can download here http://www.pathofexile.com/ once you sign up. The format hall bes:
-Start character at level 1
-Go through the game as fast as possible while leveling quickly.
-After 2 hours, leveling shall stop, and PvP shall commence! Expect hilarity!
-For more information talk to Adblax, who will be running this event.
Happy hunting.