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