Lemony Snicket: A Series Of Unfortunate Events [GC]
Go to Uncle monty's house. Go to where the snake lamp is in the main room. It will say, press B. Press it and you will have something unlocked in the extras menu.
You must collect all 75 puzzle pieces in the game.
There are several "secret rooms" in Count Olaf's house. The first one is behind the tapestry with the magnifying glass on it.
Go to the caverns, by the sign of a house by the boat.