Here is the full list of all 16 I commissioned some cats 2 achievements.
Find everything hidden in the Plant Cathedral artwork.
Find everything hidden in the Pumpkin For Dinner artwork.
Find everything hidden in the Many Started Projects artwork.
Find everything hidden in the London Skyscrapers artwork.
Find everything hidden in the Cliff Cottage artwork.
Find everything hidden in the Fields and Skyscrapers artwork.
Find everything hidden in the Cheese Time artwork.
Find everything hidden in the Post Party Lockers artwork.
Find everything hidden in the Up Late Drawing artwork.
Find everything hidden in the The Spare Bedroom artwork.
Complete the game in its entirety.
Find everything hidden in the Painting A Rose artwork.
Find everything hidden in the Cattle Field artwork.
Find everything hidden in the Village Wagon artwork.
Find everything hidden in the Chaotic Bike Collage artwork.
Find everything hidden in the Huge Claw Arcade artwork.