Hi Marmon,
It's a short time based survival game which can have a battle royal aspect if you play with friends etc.
On starting the game if you click "LAN Host(H)" it will host a local server for you and start the game.
There is a ready up function in case you wanted to play with more people but if not just hit the action key and the game should count down and start.
Cheers,
Penguino