"how does that work with multiple people?" now imagine that, between you and your friend's randomized games, the items for both games could end up in either game. if we use the metroid/zelda idea from earlier, metroid might have zelda's boomerang, while zelda might have metroid's morph ball. the logic to ensure the games are solvable is still there, but you might be stuck waiting until your friend finds your key item. this is called "being in burger king" or 'being bk'd"

burger king: when you have run out of checks of your own and are waiting for someone else to send you a critical item you need to make any meaningful progress again. named after the first multiworld randomizer, where someone was stuck for so long, they were able to go to burger king for six hours and return only to still be in the same situation