Cat Mail Co. 17-Achievement Checklist

Cat Mail Co. 17-Achievement Checklist

Before you start hunting achievements, sort parcels into three small zones: unfinished, achievement attempt, and ready to route. This keeps test parcels away from regular mail and makes missing stamps easier to spot.

Steam lists 17 achievements. Most show their requirements, but Cats don't belong in water and A well deserved retirement have blank descriptions on the public achievement page. The checklist below combines the visible requirements with current achievement guides. For parcel-identification achievements, inspect a qualifying parcel and apply the matching handling stamp yourself.

Exact Stamp and Boat Milestones

These four achievements track separate totals. From Cats Island with love needs 1 decorative stamp, Stamps hobbyist needs 10 stamps on one parcel, and Heavy duty needs 500 stamp placements overall. Float Mail Co. requires at least 30 parcels in the boat at the same time.

For the boat attempt, stage small, ready parcels near the dock and count each one as it goes aboard. Patch #1 increased the boat's storage space, while Patch #2 later adjusted its storage types.

Special Parcel and Room Audit

• Heavy, Fragile, Cold, Hot, or Lovers missing: Find a qualifying parcel and apply the matching handling stamp yourself.
• Repair missing: Repair a damaged parcel after the repair room becomes available.
• Dark or Light missing: These achievements come from opening the rooms, not identifying dark or light parcels.
• Cold or Hot room missing: The achievement checkpoint is opening the matching room.

Spoilers: How to Reach the Ending

Keep clearing the main parcel pile as its later stages become available. A Steam community achievement guide reports that this eventually exposes the Break Room, while normal progression later provides its key. Open the room and follow the old-postman event to finish the story. See Patch #1 Tools, Special Rooms, and Routes Through Foggy Mountains for the Break Room route instead of trying to force the blocked door early.

The full completion sequence is better supported than any claim about the exact achievement trigger. Editorial guides connect A well deserved retirement with finishing the story and liberating the old postman, but Steam hides the achievement description. The public evidence does not show whether it unlocks when the Break Room opens, during the postman event, or at the final story transition.

A Well Deserved Retirement: Trigger Caution

Treat the Break Room and old-postman ending as one late-story sequence. Freeing the old postman is a useful checkpoint, but the available evidence does not confirm that this single action is the achievement's sole trigger.

If the achievement does not appear during the event, complete the entire ending sequence before troubleshooting. For All cleaned up, keep clearing the finite pile stages rather than simply moving those parcels elsewhere in the office.

Current Patch Recovery

Patch #1, released July 11, reduced the cold- and hot-room piles, enlarged the boat, and fixed a problem that prevented the Break Room key from returning when an eligible save was loaded. Patch #2, released July 16, fixed All cleaned up for invited multiplayer guests and told affected players to load the save where the problem occurred. It also fixed oversized or missing main piles on some demo saves.

Patch #3, released July 17, fixed old demo saves that were missing the bright and dark keys. If an achievement appears stuck, work through these recovery steps:

1. Install the latest game update before trying the achievement again.
2. If an invited guest previously missed All cleaned up, load the affected save. Patch #2 specifically says this should unlock it.
3. If an older save missed the Break Room, bright, or dark key, update the game and reload that save before starting over.
4. For parcel, stamp, or boat achievements, repeat the required action with a fresh parcel or load.
5. If the updated save still fails, preserve it and report the issue through the game's Steam Discussions or official Discord.

These steps address the problems named in the patch notes, but they cannot guarantee a fix for every unrelated achievement issue.

Are Any Achievements Missable?

A Steam community guide reports that play continues after the story, so you can still attempt repeatable parcel, stamp, repair, water, and boat actions. This does not prove that every one-time room or story event can be replayed. However, the official patches added reload fixes for the main reported co-op and imported-demo problems, so the available evidence does not support calling the room and story achievements inherently missable.

Final 17-of-17 Audit

• Parcel properties: Heave Ho, Be careful, Keep it cold, Until shipment do us part, and Hot, hot, hot!
• Room doors: Iced whiskers, Night vision activated, Take off your furr, and Sunbath siesta.
• Stamp totals: From Cats Island with love, Stamps hobbyist, and Heavy duty.
• Boat load: Float Mail Co. needs at least 30 parcels aboard at once.
• Water and repair: Cats don't belong in water and As good as new.
• Backlog: All cleaned up requires the finite pile-clearing milestone.
• Ending: Expose and open the Break Room, then complete the old-postman story sequence for A well deserved retirement.

Once every row is checked, the neglected post office has become a working postal machine—one scan, stamp, shelf, and crowded boat at a time.