There are many changes that can be placed on top of the fundamentals of battle royale. For example, "Fortnite" introduced a temporary mode in an event which is 50-versus-50 player mode in its "Fortnite Battle Royale" free-to-play game; players are assigned one of the two teams, and work with their teammates to get resources and weapons towards making forts as the safe area of the game shrinks down, with the goal to defeat all the players on the other team.