Fortnite: Save the World is a player-versus-environment cooperative game, with four players collaborating towards a common objective on various missions. The game is set after a fluke storm appears across Earth, causing 98% of the population to disappear, and the survivors to be attacked by zombie-like "husks". The players take the role of commanders of home base shelters, collecting resources, saving survivors, and defending equipment that helps to either collect data on the storm or to push back the storm. From missions, players are awarded a number of in-game items, which include hero characters, weapon and trap schematics, and survivors, all of which can be leveled up through gained experience to improve their attributes.