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