How to get every achievement in Cat Mail Co.

You have (correctly) identified a heavy package.

Early in the game you get access to the scanner. When a customer brings in a package, use the scanner to check the package for anything of note. Sometimes you learn that the package is heavy. Once you do, stick the weight sticker on it.

You have opened the cold refrigerator.

After several shifts and lots of scoring you have unlock the key to the cold room. The key is at the counter. Use it for open the cold room in the side hall.

You have (correctly) identified a fragile package.

When you scan a package which has been brought in and see a picture of a glassput the fragile glass sticker on it.

You fell into the water.

There is water at back of the post officewhere the boat enters. Drop into that water.

You have (correctly) identified a cold packet.

Once you get into the fridge, certain packages have to go in there. When with the scanner you will see a small snowflake. When you do, hit one ice temperature sticker on it.

You have placed 1 decorative stamp.

IN sticker menu, you will notice a department for decorative ones. Put one on a package.

You have (correctly) identified a “lovers” package.

At one point in the game, you unlock the “lovers” packs. When you scan these and see a love heart, stamp them with a heart.

You have opened the dark room.

Play far enough into the game to gain access to the dark room and enter it.

You placed 30 or more packages in the boat.

When boat arrives and you take away what he brings, you have to replenish it. If you use quite small packages, you can get more than 30 on.

You have placed 10 stamps on the same package.

Take a package and put a bunch of decorative stamps on it. If there is ten in total on the packageyou get the achievement.

You have repaired a package.

When you collect enough packages from the large pile in the main roomyou eventually gain access to another room. Here you can place a damaged package on the bench and click on the box next to it to fix it. Damaged packages are usually darker and look visibly rough.

You have opened the heated room.

When you get far enough into the game, you get access to the heated room.

You have (correctly) identified a hot packet.

Once you've unlocked the heated room, you can use the scanner to identify a package that needs heat. Once you do, slap the hot stickers on it.

You have stamped 500 stamps on packages in total.

Keep apply regular and decorative stamps to packages until you reach 500.

You have opened the light room.

If you play the game enough, you gain access to the light room. Once you have unlocked it, enter it.

You finished the story and freed the old postman.

Beat the game.

You emptied the stack.

Get all the packages from the pile in the main room. Not all packs in the stack are available immediately, so you won't get this achievement until the end of your playthrough.