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