Here is the full list of all 30 Dropsy achievements.
Dropsy is on the job!
Dropsy meets a friend in need.
Dropsy does some crimes.
Dropsy rescues a new friend from peril.
Dropsy delivers a birthday present.
Dropsy made sure to use the bathroom.
Dropsy probably isn't a vampire.
Dropsy is underground, so he must be cool now.
Dropsy is a master chef.
Dropsy witnesses a monstrous transformation.
Dropsy reached the end of his journey.
Dropsy has a solid collection.
Dropsy becomes a groupie.
Dropsy makes a tree smile.
Dropsy hugged all he could hug.
Dropsy couldn't stop putting things in his pants.
Dropsy causes a kitchen nightmare.
Dropsy made a lot of new friends.
Dropsy and friends displaced a lot of dirt.
Dropsy found all the good fishing spots.
Dropsy's dog peed absolutely everywhere.
Dropsy started having recurring dreams.
Dropsy caused quite a stink on the save screen.