A battle royale/dungeon crawler type deal for squads of 2-4 characters that are compelled to battle it out in a race to the finish line type situation. No idea on the details of the setting, but it would maybe be a hunger-games style battlegrounds or naruto's chuunin exam arc forest of death type deal. Maybe a low-tech fantasy thing or whatever, wouldn't super duper matter. Lore details are a bit more important. Will be something along the lines of some kind of treasure hunt for some magical goblet or what have you. Maybe something like in Magi: The Labyrinth of Magic where these heavenly towers spawn all over the world so bands of people from all over the world enter into one in the hope of reaching the treasure and ascending or getting ultra-mega rich or whatever. Maybe there's a djinn that grants wishes at the end. Backstory would be super simple: the first dungeon got cleared and the winners had really good stuff happen to them so now everybody wants in. So the next dungeon/tower/whatever arrives and everyone and their mother tries to race to the finish line. Eventually the first treasure gets found and the whole thing would reset and move on to the next tower/dungeon/whatever.
Idk I'm just spitballing. Kind of got inspired by multiplayer rpg's like Borderlands/Tiny Tina's Wonderland and other 4p vidya like Vermintide as well. Might just be that though, a borderlands inspired site where people hop from one planet to the next trying to be the first ones in the vault. So there'd be high-tech but also space magic and everyone could have a unique character ability and a whole lotta weapons. But maybe it could also fit into a fantasy style universe where people mostly use swords n bows. Idk T_T
Only thing I'm not a huge fan of is getting isekai'd/panfandom'd into an alternate universe so that's not something I envision working here. Not that I envision this working hehe