The SpongeBob SquarePants Special Pack Add-on for PowerWash Simulator has 10 achievements.
Complete the Conch Street job
Complete the Bikini Bottom Bus job
Complete the Krusty Krab job
Complete the Patty Wagon job
Complete the Invisible Boatmobile job
Complete the Mermalair job
In the Conch Street job, complete Patrick's Rock, Rock Hinge and Rock Underside last
In the Krusty Krab job, complete the Chum Bucket first
In the Patty Wagon job, complete the Pickles first
In the Mermalair job, complete Patrick's Identity Card first