You should also try SCEE ICO-team's (creators of SotC) first game, ICO. It has the same world (althogh not the colossus land but a huge demonic temple) and the same basic ideas. Speech only in critical parts of the game, amazingly beautiful surroundings, impossible quest. Basically a 12 year old boy with horns named Ico is left to starve in a huge temple as part of a religious ritual, but miraculously his stone cell collapses and he tries to find a way out of the mystical place with a pure white little girl with special powers named Yorda.