Here is the full list of all 33 Thimbleweed Park achievements.
Grew Leonard's plant to superhuman size.
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.
Navigated to the buried treasure.
Used Ransome's Itch Cream.
Get an alive character into the Hotel penthouse.
Begin Part Four.
Catch the killer.
Collect 50 specks of dust.
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.
Read all the Thimbleweed Nickel newspapers.
Listen to 100 Voicemail messages.
Make everyone cry about their life.
Got Ransome's bad ending.
Didn't pick up any specks of dust.