Here is the full list of all 52 Cats Everywhere achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Find the special cat hidden in the street.
Find the special cat hidden in the room.
Find an object: There is a teddy bear somewhere.
Find an object: There is a soccer ball somewhere.
Find the special cat hidden in the kitchen.
Find an object: There is a cup somewhere.
Find an object: There is a wall clock somewhere.
Find an object: There is a painting of flowers somewhere.
Find an object: There is a good book to be read somewhere.
Find an object: There's a globe somewhere.
Find All the Cats in the Street.
Find an object: There are suitcases somewhere.
Find 200 cats in any place.
Find another animal: There's a frog somewhere.
Find 150 cats in any place.
Find another animal: There is a fish somewhere.
Find an object: There is a fire hydrant somewhere.
Find another animal: There's a dog somewhere.
Find All the Cats in the Bedroom.
Find an object: There is a toy dinosaur somewhere.
Find an object: There are toy blocks somewhere.
Find 125 cats in any place.
Find All the Cats in the Kitchen.
Find 100 cats in any place.
Find an object: There is an old box somewhere.
Find an object: There is a coffee maker somewhere.
Find an object: There is a basket of apples somewhere.
Find 75 cats in any place.
Find 50 cats in any place.
Find All the Cats in the Living Room.
Find 25 cats in any place.