Specific friend: Solo/Co-op. Public world: Online. Story gate: Solo.
Most failed sessions begin with the wrong mode. Open the bamboo-hat Mode Switch, create a private Solo/Co-op room for a friend, and start bosses from their multiplayer-eligible activity page. Do not expect a guest to inherit the host's Main Chapter completion.
Invite a friend correctlySpecific friends
Solo/Co-op
Open a private room, then invite by friend entry, Player ID, or code.
Public world
Online
Use the shared social world for other players and online activities.
Main story
Usually solo
Do not plan a shared campaign around host progress.
Crossplay
Yes
Current platforms can play together inside the same server region.
