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 a safe building as the safe area of the game shrinks down, with the goal to defeat all the players on the other team.