Ray Gigant
Ray Gigant is a Japanese dungeon crawling role-playing game. Ray Gigant is set in June of the year 20xx, where the world was destroyed by a huge creature called "Gigant" that suddenly appeared on the planet. In combat, your party consists of three members. Unlike other dungeon crawlers from Experience, the perspective in battle shows the back of the characters.
Story
"This adventure is set in the near future.... The great cities of the Earth have been invaded by huge, terrifying creatures called giants. All over the world, the armed forces of all nations tried to repel the attacks, but, but to their horror, they failed miserably. By a quirk of fate, it was reported that a boy named Ichiya Amakaze defeated a giant. The boy defeated the giants with a mysterious power called Yorigami. However, this victory was short-lived. Ichiya lost control of his power and tragically destroyed the city he tried so hard to protect. After this fateful experience, he fainted. Ichiya was then arrested and taken to a a safe place, where his destiny would would soon unfold..."