Professor Layton, being the intelligent puzzle master he is, leaves to Luke some extra and quite difficult puzzles for the player to complete after you complete each installment of the Professor Layton series. These difficult puzzles give you 50 to 99 Picarats and are known as Layton's Challenges.

The player unlocks one of the five "houses" (containing three puzzles) whenever you meet the certain criteria. For the first three you must beat the respective mini games. For the bottom two you must finish the main storyline for the game and you must complete every puzzle in the game excluding the three within the last house.

Professor Layton and the Curious Village

CV Layton Challenge

The Inventor's House

The Decorator's House

The Art Lover's House

The Golden Apple's House

The Puzzle Master's House

Professor Layton and the Diabolical Box

DB Layton Challenge

The Musician's House

The Tea Master's House

The Animal Lover's House

The Sweethearts' House

The Puzzle Doctor's House

Professor Layton and the Unwound Future

UF Layton Challenge

The Storyteller's House

The Hotelier's House

The Messenger's House

The Time Traveler's House

The Puzzle Keeper's House

Professor Layton and the Last Specter

The Boatman's House

The Biologist's House

The Puppeteer's House

The Flute Player's House

The Puzzle Keeper's House

Professor Layton and the Miracle Mask

Challenges MM

The Toymaker's House

The Shopkeeper's House

The Ringmaster's House

The Reunion House

The Puzzle Queen's House

Professor Layton and the Azran Legacy

The Fashionista's House

The Forest Dweller's House

The Keen Gardener's House

The Azran Emissary's House

The Puzzle Lover's House

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