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