Could there be a toggle that will check info between 2 map codes? This could help with making quests that you could start in one game and finish in another.
Maybe in the form of badges (like Roblox) and you could see if a player has the select badge and could let a player do something.
For example - A crossover event between 2 games, where you could earn a badge in one game and then in another game you get a new weapon (if the player has the given badge).
Thanks for reading, I hope this gets added!