Hello,

is there currently a system (or has someone written one) to set/remove world flags?

Example: area X, players are unable/able to do X.
   

Example in the picture, black = no flag,
red = specific area entered. Example Battle(notification that you entered Battle area).
orange = you are able to fly
blue = water flag (allow swimming/dont allow swimming)

if you are using Game.World you can try replacing the original utilizing Game.SetAreaData or Game.SetAreaClass with an extended object from Game::Area or Game::AreaData