Final Fantasy Crystal Chronicles - Gamecube (Very Good)
The world is enveloped in a poisonous vapor. Anyone who comes into contact with it must die. But humans have learned to develop a technology that would help them to protect themselves from the deadly vapor. The light of Crystals shines in small villages and in large towns. But those protective Crystals have to be refilled every year with the purifying Mana Water, otherwise their energy will extinguish. Every year, villages send four youths to retrieve the Mana Water that is hidden deep in dungeons and dangerous caves.