Cats in Time Locations for All Postcard Pieces & Missable Achievements

One of the pieces is under a rock, you’ll have to first click the rock to move it.

Note: clicking on the painting on one of the outside walls (more precisely, on the head of the right figure) will award you the “Ancient Aliens” achievement.

For the rightmost one from this picture, you’ll have to slide the marble plate upwards.

Slide to the right:

Visible only after you solve the windmill puzzle:

Press the button on the side of the building:

Visible only after you solve the roof puzzle:

Visible only after you solve the tower puzzle:

Note: forging the sword will award you the “Blacksmith” achievement.

The third one is actually under the skull, you’ll have to click it first in order to move it.

Next to a cat, after solving the puzzle with the valve:

Note: By clicking on the t-shirt hanging on the balcony you will get the achievement “Waldo”.

Inside the vent:

Take the elevator up:

Note: If you press on the 3 pillars in from of the door at the bottom of the building, you will get the achievement “Call the cab”.

Note: if you click on the drone and wait around 5 seconds without doing anything, you will get the achievement “Pilot”.

Click on the stone first to remove it. The postcard piece is underneath it.

Unlocking the secret level and entering it will award the “Conundrum solver” achievement.
What to do in order to unlock it is described below under spoiler tags.

Go to the menu and set up the numbers (and pressure dials) like so, then press the yellow button:

Hints for the code can be found in the same room, on the panel with the postcards (some of them have numbers, the others show the correct configuration for the dials).

Inside the level, you will need one extra code to solve one of the puzzles. This is shown on the bottom right postcard: 2332.