Chrono cross by Squaresoft is the sequel to the smash RPG hit Chrono Trigger from 1995. Yet fear not, playing the first game is hardly necessary to be able the second.
Whereas Chrono Trigger dealt with story themes of time travel, Chrono Cross is more concerned with a kind of cross-dimensional travel, where the time is exactly the same, but circumstances are different. A young, adventurous type named Serge is suddenly ripped from his Home World one day to find himself in Another World. As he struggles to put the wrong things right in this alternate dimension, the circumstances in Serge's Home World take a turn for the worse. Serge must now cross back and forth to maintain the balance between good and evil in both worlds. Chrono Cross challenges the player to an arduous task indeed.