Earthbound (aka Mother 2) is a popular turn-based RPG released for the Super Nintendo Entertainment System in North America on June 1, 1995.
The story revolves around four children (Ness, Paula, Jeff and Poo) and their quest to save the world from the evil being known as Giygas. 
Earthbound gained a cult following by blending traditional RPG gameplay with decidedly non-traditional characters, storyline, settings and humor.
Though many campaigns have been put forth by different groups (i.e. starmen.net) to bring sequels to English markets none have been successful as of yet.