In Cat Mail Co., a vanished postman has left a quiet island’s post office buried under undelivered mail. Players take over the work of restoring the service, with the backlog also serving as a story to uncover. Its focus is not on racing through deliveries, but on settling into small tasks and shaping an orderly workspace.
Each parcel calls for hands-on preparation: weigh it for postage, add a destination label, mark it as fragile or heavy, and decorate it with stamps. Incoming mail arrives by boat, while outgoing parcels need careful loading so they reach the right destination in good condition. Players can arrange storage to suit their preferences and prepare for incoming work; improvements open new destinations, tools, and abilities. At night, moonlight can reveal unusual properties that change how some packages should be handled, giving the familiar routine a magical dimension.
The game supports solo play as well as cooperative play for up to four people, who can share tasks such as sorting, stamping, and loading. Its stated design emphasizes a relaxed pace, with no timers or penalties, and lets players decide how to handle each package.