Here is the full list of all 41 Labyrinth City: Pierre the Maze Detective achievements.
Grow the magic bean.
Listen to everything he has to tell you.
Find Pierre's strange double.
Finish the Downtown level with all its collectibles.
Get on the roof of a car.
Change an option in the option menu.
Get all the Achievements in game.
Catch Mr X... or not.
Finish the Museum level with all its collectibles.
Finish the Street Party level with all its collectibles.
Finish the Southern Castle level with all its collectibles.
Finish the Village in the Forest level with all its collectibles.
Finish the Haunted Manor level with all its collectibles.
Finish the The Forgotten City level with all its collectibles.
Finish the On the Docks level with all its collectibles.
Finish the Flea Market level with all its collectibles.
Finish the Final Giant Maze with all its collectibles.
Get all the Chests.
Get all the Pages from Mr X's Book.
Get all the Stars.
Get all the Trophies.
Get all the collectibles in game.
Find Gmlf in all the levels (apart from the Haunted Manor).
Find Coco in all levels (except at the Southern Castle).
Find Hoshi in all levels.
Find the Polar Bear in all levels.
Walk 10,000 steps.
Find the man who has seen the seabed maze.
Shoot both fireworks.
Lock yourself in the cage.
Search all the bushes in the Museum.
Find out whether the chicken or the egg was first.
Shock Dr Frankenstein's creature 5 times.
Throw the rock into the sea.
Lock yourself behind the door that leads nowhere.
Find where the pink animals come from.
Launch the real Golden Hen's rocket.
Find Pierre's twin sister.
Find Waldo.
Press M to "open map".
Catch 5 ducks.