There's this one dark, artsy point 'n click adventure game I can't find because I don't remember what it's called. Maybe this synopsis will ring a bell:
You're in a dark castle tower with a forest outside. To get to the top of the tower you have to bridge a broken staircase. Once you do and you get to the top, you climb through a trap door only to discover yourself at ground level in a new world. At the end, you discover the truth about yourself by looking in a mirror.
Anyone know what I'm talking about?