i thought it's prequel? i mean since the main character in sotc i guess becomes the 1st of the horneds? it's such an old game do i need to spoilerify those?
Wander and Mono start the line of "cursed" children (horned children) that eventually leads to Ico being born. In that way, Ico is a chronological sequel to Shadow of the Colossus, despite having come out first.