Unturned
The popular survival game Unturned, which has been in development since 2014, was removed from Early Access on Steam and officially released on July 7, 2017.

Unturned, with over 24 million downloads, is one of the most popular games on Steam. What's special about it: It was developed by only one developer, Nelson Sexton, who started Unturned at the age of 16. The game, which has been in Early Access since 2014, now includes Patch 3.2 and the new map Germany, and has been officially released on Steam.

Unturned is a zombie survival game where the player must try to survive on a zombie-infested map without dying.

Feeling intrigued by Unturned? As a Free2Play game, it is available for free on Steam.

At ZAP, you can, of course, rent Unturned servers inexpensively.