Here is the full list of all 33 Thimbleweed Park achievements.
Complete the game in hard mode.
Part Nine: The Deleting.
Part Eight: The Escape.
Collect 50 specks of dust.
Part Seven: The Madness.
Part Six: The Factory.
Begin Part Five.
Blew up the Mansion.
Get an alive character into the Hotel penthouse.
Collect 25 specks of dust.
Begin Part Four.
Catch the killer.
Used Ransome's Itch Cream.
Complete Franklin's Flashback.
Begin Part Three.
Complete Delores's Flashback.
Complete Ransome's Flashback.
Begin Part Two.
Begin Part One.
Complete the game in casual mode.
Stayed for all the credits.
Escape from the sewers.
Pushed the circus mime over.
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.
Collected 75 specks of dust.
Got Ransome's bad ending.
Didn't pick up any specks of dust.