Here is the full list of all 33 Thimbleweed Park achievements.
Grew Leonard's plant to superhuman size.
Read all the Thimbleweed Nickel newspapers.
Stayed for all the credits.
Complete the game in hard mode.
Part Nine: The Deleting.
Part Eight: The Escape.
Collected 75 specks of dust.
Part Seven: The Madness.
Part Six: The Factory.
Begin Part Five.
Visited every floor in the hotel.
Blew up the Mansion.
Get an alive character into the Hotel penthouse.
Collect 50 specks of dust.
Begin Part Four.
Catch the killer.
Used Ransome's Itch Cream.
Collect 25 specks of dust.
Complete Franklin's Flashback.
Begin Part Three.
Escape from the sewers.
Complete Delores's Flashback.
Complete Ransome's Flashback.
Begin Part Two.
Begin Part One.
Complete the game in casual mode.
Pushed the circus mime over.
Read 100 books in the library.
Listen to 100 Voicemail messages.
Make everyone cry about their life.
Navigated to the buried treasure.
Got Ransome's bad ending.
Didn't pick up any specks of dust.