Square's 2003 role-playing game makes its DS debut with wireless support for up to four adventurers. As in the GameCube original, notable for its use of the Game Boy Advance as a controller, the world in Final Fantasy: Crystal Chronicles is enshrouded in a deadly gas called Miasma. To save the realm, players must venture deep within a series of foreboding dungeons to locate ancient trees with the power to purify the air. The Legend of Zelda-style action takes place on the top screen, while the touch screen displays helpful information such as dungeon maps, enemy radar, and the location of treasure chests. After selecting a character from one of four tribes, each varying in strength, defense, health, and magic, players will travel from town to town via caravan. Along the way are opportunities to talk with local townsfolk, purchase supplies, and complete errands, but the focus is primarily on real-time battles with an assortment of colorful enemies. Players can perform melee attacks or cast spells, with teammates able to string together more powerful attacks by quickly tapping buttons in sequence. Each puzzle-filled dungeon culminates in a boss battle that requires a combination of attacks to succeed.