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