Ushi No Tane - Harvest Moon

A small question, I'm a « new farmer » here. Can someone explain the organization of the games on the Board Index? Specifically, what makes a Harvest Moon game be classified in the "Other Games" section? What about, say, Magical Melody, A Wonderful Life, and Animal Parade makes them not have their own category?

Cher mostly focuses on the handheld HM games, and lumps the console HM games into the OTHER HARVEST MOON GAMES section.