Unturned is a sandbox game in the emerging multiplayer apocalypse survival genre. Rather than focusing on being an MMO it provides players with easy systems to sit down and survive the zombie infestation with their friends. Over the course of a typical adventure, groups will have a blast fortifying locations, scavenging for supplies, trying to live off the land and negotiating with other people.
The files you need to simple create a Server with all possible options and workshop support.
A simple and short "How to create a Server" Guide + "Sergverfiles" for a simpler way.
(Normaly you have to enter commands to start a server or to create the serverconfig and folders)
Full Guide on Steam: Steamcommunity.com
Sorry for my bad english.