H1Z1 us a zombie apocalypse free-to-play online game (but with the inclusion of microtransactions). It’s battle royale mode is called King of the Hill.
A sandbox survival mode called Just Survive is also currently in development and in Early Access.
Publisher: Daybreak Game Company
Developer: Daybreak Game Company
Platforms: PS4, Xbox One, PC
Release Date: PC: February 28, 2018; PS4: May 22, 2018; Xbox One: TBA