How to Play Cat Mail Co Co-op

Cat Mail Co supports online co-op for up to four players through Steam. Host a session from the main menu and invite friends through Steam overlay. All players share the host's save progress, so play with friends whose progression you want to continue.

Before starting, agree on role assignments and storage zone naming. Five minutes of pre-planning prevents hours of chaotic parcel scrambling. Read our full Co-op Guide for detailed role descriptions.

Assign Dock Worker, Postal Clerk, Organizer, and Customer Assistant roles. The Clerk handles stamp mode at the processing station. The Dock Worker manages boat operations at dusk. The Organizer maintains storage zones. The Customer Assistant serves island residents and reads story dialogue.

With two players, combine Clerk + Organizer and Dock Worker + Customer Assistant. With three, add a flexible floater who helps wherever the bottleneck appears.

The review video below includes co-op commentary and demonstrates how multiple players coordinate within the post office. Watch how responsibilities divide naturally and how communication affects workflow efficiency.

Use voice chat. Call out parcel status and destination batches. Finish one parcel completely before starting the next — half-processed items confuse teammates. Designate fragile package zones that everyone respects. During night shifts, assign one investigator for moonlit mail while others maintain daytime processing.

For workspace layouts optimized for team play, see the organization guide.