ICO incorporates elements from puzzle, adventure, strategy, fighting and role-playing-game genres. It's the tale of a courageous young boy on a heroic journey through an unknown castle to save a princess and discover his own mysterious fate. Faced with numerous puzzles, ranging from simple mazes to complex brainteasers, ICO invites gamers into a deep, mysterious story line with beautiful, dreamlike graphics.
As the story goes, once every generation a boy is born with horns. Thought to be the minion of an evil spirit, the afflicted but innocent ICO was captured at age 12 by the village's leaders and brought to a deserted castle to be sacrificed for the good of the community. After the villagers bury him alive in a castle tomb and leave him for dead, he is able to break free of his confines; he then learns of a beautiful young princess who is likewise held captive. From there he embarks on a challenging course through the castle ruins to save her.