https://www.pcgamer.com/h1z1-has-relaunched-and-rebranded-to-z1-battle-royale/

H1Z1's third season arrived today, as well as a rebranding to Z1 Battle Royale, marking the third name change the game has undergone (originally, it was called H1Z1: King of the Kill). More than just the name has changed: a new developer, NantG, has taken the helm and is promising to revitalize the game by 'restoring' a number of its old features like animations, vehicle mechanics, guns and combat, and even the map itself to bring it back to "the glory days."

It's an interesting strategy, I guess: reverting the game back to how it was during the height of its popularity (and it was extremely popular) and undoing many of the changes fans have disagreed with over the past few years. Nothing seems to have gone untouched, including the UI: