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 an object: There is a cup somewhere.
Find the special cat hidden in the room.
Find the special cat hidden in the street.
Find the special cat hidden in the kitchen.
Find All the Cats in the Street.
Find an object: There is a fire hydrant somewhere.
Find 200 cats in any place.
Find 150 cats in any place.
Find another animal: There's a dog somewhere.
Find another animal: There's a frog somewhere.
Find another animal: There is a fish somewhere.
Find an object: There are suitcases somewhere.
Find All the Cats in the Bedroom.
Find an object: There is a soccer ball somewhere.
Find 125 cats in any place.
Find an object: There is a teddy bear somewhere.
Find an object: There are toy blocks somewhere.
Find an object: There is a toy dinosaur somewhere.
Find 100 cats in any place.
Find All the Cats in the Kitchen.
Find an object: There is a coffee maker somewhere.
Find an object: There is a wall clock somewhere.
Find an object: There is an old box 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 an object: There is a good book to be read somewhere.
Find an object: There is a painting of flowers somewhere.
Find 25 cats in any place.
Find an object: There's a globe somewhere.