Here is the full list of all 16 Midnight Mysteries 4: Haunted Houdini achievements.
Conjure a pigeon.
Get into Houdini's house without a hint.
Complete each HOG in Story Mode without the lantern.
Escape from Houdini's coffin in one try.
Find all 100 padlocks, handcuffs, keys and straightjackets in "Escape Artist Hunt."
Complete the bonus chapter.
Find all the ESP cards in the garden in one try.
Solve all the puzzles in Story Mode.
Complete a hidden object scene in less than a minute.
Complete Story Mode.
Unlock Unlimited Hidden Object Mode.
Collect all 70 clovers in Story Mode.
Find every hidden object in all Unlimited HO Mode scenes.
Collect all 52 ravens in Story Mode.
Complete Story Mode without using any hints.
Complete Story Mode with no Black Cat scares.