Fortnite is the live action building game using Unreal Engine 4 from Epic Games. You and your friends can band together online to build extravagant forts, find or build insane weapons and traps and protect your towns from enemies.
Fortnite features a 100-player Battle Royale mode - One giant map. A battle bus. Fortnite building skills and destructible environments combined with intense PvP combat. The last one standing wins.
There is an increasingly growing esports scene for Fortnite even though it is a relatively young game. Epic Games themselves have announced to hold the Fortnite World Cup tournaments with teams representing various countries.