The 17 achievements fall into four systems: quick manual actions, parcel identification, room and repair progression, and two endgame clears. Prove the easy triggers first, let ordinary work accumulate the long counters, and delay the 30-parcel boat until destination staging is stable. That order avoids turning achievement cleanup into a warehouse recovery job.
This roadmap was checked on August 24, 2026 against Steam’s current 17-row achievement page and Patch Note #6. Global completion percentages are intentionally omitted because they drift. The names and requirements below use the live English Steam record; the current client and unlock popup remain the final authority.
Use three quick achievements as a control test
Before investing in room progress or long counters, confirm that this save and Steam session record simple actions:
- Cats don’t belong in water: step into the water beside the dock without carrying an important parcel. The cat respawns; require the achievement popup.
- From Cats Island with love: place one decorative stamp on any parcel after its required postage is readable.
- Stamps hobbyist: put ten stamps on the same parcel. Use decorative stamps on one expendable, already-correct box so important label fields stay visible.
If none unlock, restart the Steam client and verify the game is online before grinding. If the first two work but the ten-stamp check does not, count stamps on one physical parcel rather than across several packages.
Pair the first scanner checks
Heave Ho requires correctly identifying a heavy parcel; Be careful requires correctly identifying a fragile parcel. Put customer-submitted mail through the scanner, wait for the relevant icon, then apply the matching heavy or fragile stamp. Weight postage is not the heavy constraint, and a large box is not proof.
The Steam community achievement guide reports that removing and reapplying a correct constraint sticker from a pile parcel can also trigger identification. A cleaner first-play route is to use the scanner as designed, because it proves that you can recognize the rule and prevents storage damage at the same time.
Let keys create a four-room checklist
| Room achievement | Observable action | Related parcel achievement |
|---|---|---|
| Iced whiskers | Use the refrigerated-room key and open the cold room | Keep it cold — scan a snowflake parcel and apply the cold stamp |
| Night vision activated | Open the dark room when its key appears | Until shipment do us part — correctly identify a lover parcel |
| Take off your furr | Open the heated room | Hot, hot, hot! — scan a heat parcel and apply the hot stamp |
| Sunbath siesta | Open the light room | No separate light-identification achievement |
Keys and gadgets arrive through normal progression as parcels leave correctly and piles recede. Do not stand beside a locked door waiting for a fixed day number. When a key appears, open the matching door and wait for the Steam readback before moving it or reloading.
For Until shipment do us part, identify the heart constraint and stamp the lover parcel. To complete the actual postal job, use lamp mode 1 in the night phase or while the captain remains docked the next morning, find the linked partner, and ship both together. Patch Note #6 fixes partners changing after reload and the VFX pointing upward, so old launch workarounds should not define the current attempt.
Make the first repair count twice
As good as new unlocks when you repair one parcel. Keep a confirmed damaged parcel in quarantine while clearing the main pile. When that pile reveals the Repair Workshop, place the box on the workbench and click one unfolded cardboard replacement. Require the clean model and the achievement readback.
The workshop repairs only three parcels per shift. If the achievement does not appear, do not consume all three supplies blindly. Verify that the original parcel was visibly damaged and that the clean replacement actually spawned. The repair workshop guide covers unlock blockers, damage causes, and repeat-damage diagnosis.
Attempt Float Mail Co. on a route-controlled departure
Float Mail Co. requires 30 or more parcels placed in the boat. Save small parcels and envelopes for one captain whose destinations match a large prepared outbound stock. Unload incoming cargo first, then count every box as it crosses onto the deck.
The achievement describes placement, not thirty successful deliveries, but a random 30-box mixture creates avoidable returns. Keep a tally by row or shelf, use only the current captain’s destinations, and stop at the popup. If the counter seems short, inspect the deck boundary: boxes leaning on the dock or another prop may look aboard without being counted.
Heavy duty should grow in the background
Heavy duty records 500 stamps placed on parcels in total. Required destination, weight, and constraint stamps contribute naturally across the story. Use decorative stamps for the final cleanup only after the parcel is correct, and keep them away from names and hazard icons.
Do not confuse this with Heave Ho; Heavy duty counts stamp actions, not heavy parcels. Keep one short control session near the end: note whether a normal functional stamp advances the remaining work, then finish in an unmodified game rather than relying on a mod or save edit.
All cleaned up and Retirement share the late pile route
All cleaned up requires emptying the pile. The main backlog does not expose every parcel at once; keep serving customers, sending valid boats, and pulling the newly available packages as the pile changes stages. A visually smaller pile is not completion. Continue until the game presents its finished/endless state and Steam records the achievement.
A well deserved retirement is the story finish that liberates the old postman. It belongs after the post office systems and main-pile progression, not in the opening cleanup. Follow the newly exposed story route when the pile and rooms allow it, complete the final interaction, and require both the in-game story state and Steam readback.
Patch Notes #2 and #3 fixed main-pile spawning, invited-player All cleaned up behavior, and old-demo dark/light key issues. If an old save remains stuck, update and retest normal pile progression before considering the supplied community save-edit guide; this roadmap does not require deleting database rows or forcing debug progression.
Reconcile all 17 by trigger, not by memory
| Block | Achievements | Final proof |
|---|---|---|
| Manual | Cats don’t belong in water; From Cats Island with love; Stamps hobbyist | 3 Steam rows unlocked |
| Identification | Heave Ho; Be careful; Keep it cold; Until shipment do us part; Hot, hot, hot! | 5 correct-stamp readbacks |
| Rooms and repair | Iced whiskers; Night vision activated; Take off your furr; Sunbath siesta; As good as new | 4 opened rooms plus 1 clean replacement |
| Volume | Float Mail Co.; Heavy duty | 30 on one boat; 500 lifetime stamps |
| Endgame | All cleaned up; A well deserved retirement | Finished pile state and story finish |
The block counts are 3 + 5 + 5 + 2 + 2 = 17. Compare that list with the Steam achievement page, not only the popup history. Co-op guests had an All cleaned up fix in Patch #2, so host and guest should each verify their own account readback.
Official record and update boundary
Cat Mail Co. on Steam is the official record for the July 9, 2026 release by Maracas Studio; the product’s AppID is 4380490 and its achievement count is 17. Exact achievement names and descriptions come from Steam’s live global achievement page; action routes were cross-checked against two readable achievement guides and the relevant package/repair references. No percentage, price, mod, community image, or save edit is presented as a permanent requirement.