Besides the Final Fantasy series there have been few rpgs that graced the PS1 that gamers still play and enjoy to this day. Even fewer titles still demand a sequel from a loyal following.
Take Sony's Legend of Dragoon.
Released in Japan on Dec 2nd 1999, North America on June 11th '00 and Europe January 19th in EU, Legend of Dragoon received mixed reviews from critics. Despite the critic's response to the game, LoD managed to create a cult following mainly in the west where LoD is currently 40,000 shy of breaking the 1million sold mark in North America. In comparison, only 280k copies have been sold in Japan to this day.