4 kids who are online friends play a video game together but the game actually ends the world, and they get transported to another dimension called the medium where they have to complete a “campaign” of sorts. Their game goes wrong when an npc character breaks the thing by becoming an unstoppable flying god and they gotta work around him now. They get contacted by aliens called trolls. It’s revealed that the game ends with them creating a new universe and that overall the game exists as the multiverse’s “reproduction” and the aliens are the players of the game session that started the human’s universe. Unfortunately due to a bunch of shenanigans on post apocalyptic earth with these little chess guys and time travel capsules the evil god npc gets into their universe too except in a really weird way where for him it’s the second universe he goes through but it’s happening at the same time for them. They all agree to end the universes here and start anew in a new universe where the 4 kid’s parents are their children. Unfortunately, the parent-kid’s game session is impossible to complete and is “filler” until the old characters come to their universe with the stuff required to beat the game. They do, shenanigans happen, and a giant massacre happens that kills all but two characters who are both use magic to retcon so everything is fine. They all finish the game together by defeating the villains containing all the items needed to beat the game and also the omnipresent villain behind everything is trapped eternally in a time loop
The end.