In Astroneer, the game’s first mission, you’ll need to build a base on an alien world. There are a few ways to do this, but the most common way is to use the editor. To start, open the editor and select the “Terrain” tab. Here you’ll find a variety of options for building your base. You can choose to create a single-player map or multiplayer map. You can also choose how many floors your base will have and how big it will be. Once you’ve chosen your options, click on “Create.” The editor will create a new terrain file for you and will ask you for some basic information about your base. For example, name your terrain “Astroneer Xbox One Base.” Once you’ve filled out these details, click on “Create.” The editor will create your new terrain file and will ask you for some more information about it. For example, make sure that “Astroneer Xbox One Base” is set as the name of your map in the “Name” field and that “Size” is set to “Small.” Click on “Create.” The editor will create your new terrain file and will ask you for some more information about it again. For example, make sure that everything is correct and click on “Finish.” The editor should now be creating your new terrain file!