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