Final Fantasy Crystal Chronicles

Game title: Final Fantasy Crystal Chronicles
Game description:

This world is a murky and fatally dangerous place. It’s filled with a poisonous gas that instantly leads to death if you contact it. The only way to protect the leftovers of the human race from a grim fate is to defend the settlements with the help of crystals. But the barrier can’t function eternally. Once its properties run out, a group of specially trained soldiers needs to walk out in search of a magical substance capable of charging the crystals. You are about to control one of these squads and accomplish this vital mission!