Set up the crew.
- Sign in to Microsoft. Everyone needs a Microsoft/Xbox account for Shared Worlds, including Steam players. Enable Crossplay in the game options.
- Add your friends. Use each other’s Xbox gamertags so the world owner can find the crew.
- Create the Shared World. One person starts the new multiplayer world and chooses Shared World. A standard save can also be converted through the save menu.
- Share access. The owner selects the world, uses Share with Friends, and grants access to each player.
The world still needs to be created in Grounded. This page doesn’t create or grant access to it.