This game can be found in the steam store for free(the demo).
First start the game
When the game is started you will see this screen, press the start game button as shown below.
Now you are in the game’s setup window. In this window you can configure anything about this game. Before continuing you need to uplink your user name to the StarMade authentication server as shown below. This does requires a starmade.org account.
Now we can start to connect to the server. Make sure to mark the Multiplayer checkbox, fill in the address or look us up in the server list and press play.
Now you can enjoy our wonderful StarMade server.