Homestuck Troll movie title

(19:11:2011 04:12 PM) Squornshellous Beta: Working Troll movie title for Homestuck:
(19:11:2011 04:14 PM) Squornshellous Beta: In which four teenage children from earth enter a videogame, wherein they must battle the forces of darkness in order to save a planet; along their way they will meet many perils; they gain assistance from teenagers from another universe, who aid them and hinder them seemingly in equal measure until their helpfulness truly becomes apparent in their own story arc; in this story arc there is a lot of story in a small space, until an unstoppable demon is summoned...
(19:11:2011 04:14 PM) Aenrhien: Uh... huh.
(19:11:2011 04:15 PM) Squornshellous Beta: This unstoppable demon prevents them from claiming their reward, and they are forced to go into hiding; this is where they first contact the heroes, from their perspective; the demon's rise to power is revealed to be all their fault all along; two main characters go insane and kill many of their number...
(19:11:2011 04:16 PM) Squornshellous Beta: An omnipotent being contacts them to offer assistance, but is secretly decieving them all along; a character falls to the corruption of the Eldritch Throes; the demon kills many in both universes and along both timelines; the heroes hatch a plan to defeat the demon by destroying his power source...
(19:11:2011 04:18 PM) Squornshellous Beta: However, things do not go according to plan; the entire adventure is revealed to be on a game disc which has become damaged, forcing the omnipotent being to repair it; the story continues through several narrative styles, before returning to normal; one of the insane characters is killed, and the other calmed by his Moirail...
(19:11:2011 04:19 PM) Squornshellous Beta: The heroes continue their plan to destroy the power source, even though this is now a suicide mission... it goes on.