Direct answer
Solarpunk supports solo play and online co-op, but the experience should be understood as host-based multiplayer, not full cross-platform server-based play.
How multiplayer works
The current official source set supports these points:
- solo play exists
- online co-op exists
- one player hosts the session
- there are no public dedicated servers
Online player limit
Official PlayStation and Nintendo storefront language currently supports up to four online players.
Personal inventories and Airships
Two co-op expectations matter immediately:
- each player has a separate inventory
- each player can have a personal Airship
How to start a session
That page focuses on host-based setup expectations without inventing unverified platform UI steps.