The Legend of Zelda
Long after the adult version Link from The Legend of Zelda: Ocarina of Time disappeared, Ganon returned, and when Link did not come to save the people of Hyrule, they asked the Goddesses to flood Hyrule. Hyrule was flooded, and many people died because of it. Hyrule was lost under the sea, and people lived on islands that are scattered around the Great Sea. The events of The Wind Waker take place many years after.