Here is the full list of all 11 I commissioned some bees 6 achievements.
Find everything hidden in the Mushroom Kingdom artwork.
Find everything hidden in the Horses artwork.
Find everything hidden in the Fortress artwork.
Find everything hidden in the Shed artwork.
Find everything hidden in the Planet artwork.
Find everything hidden in the Pumpkin Kingdom artwork.
Find everything hidden in the Concert artwork.
Find everything hidden in the Morning Crows artwork.
Complete the game in its entirety.
Find everything hidden in the Haunted House artwork.
Find everything hidden in the Junk Monster artwork.