To enjoy cross-play in Grounded 2, you'll need a Microsoft account. After you've signed up and linked the accounts, you can check to play sure cross-play is enabled by heading to the Options menu.

The only way you're able to add cross-platform players is by creating a cross-play lobby in Baldur's Gate 3. From here, you can add and invite friends, or they can invite you to their lobby.

To use cross-play in Baldur’s Gate 3, you need a Larian Account and to enable cross-play in the settings menu. To get a Larian account, you can go to the studio’s website and make one.