The Book of Tentacles [v 1.7.6.2]

In The Book of Tentacles, you're about to play an RPG where you are an ancient being that somehow finds himself in a whole different world. It's a world filled with mythical creatures, magic, and, as you probably guessed, beautiful girls. You'll need to figure out what secrets are in your past that have been completely disappeared from your memory. You'll also discover that you have unique special powers. For example, you can reveal a person's hidden desires and expose their true nature.