Fortnite's developer is reportedly being sued for copyright by the creator of a similar game
https://www.cnbc.com/2018/05/29/fortnite-developer-reportedly-sued-by-pubg-corp.html
"Fortnite" developer Epic Games is facing a copyright violation lawsuit from PUBG Corp, the creator of "PlayerUnknown's Battlegrounds," according to a report.
PUBG Corp, a subsidiary of South Korean developer Bluehole, is suing Epic Games to determine whether "Fortnite" was copied directly from its own game, The Korea Times reported, citing an unnamed PUBG official.