The story of this game is rather simple: Tokyo has been destroyed by monsters! Terrifying creatures have invaded the city and ruined it. A scientist who possesses the secret knowledge of psychic powers known as ESP, imbues a young boy with them, and sends him to the streets and underground caverns of Tokyo, to rescue the few remaining survivors, and find out the source of the monstrous invasion!
Energy is an Action & Adventure game for PC Engine. The gameplay revolves around the young hero's movements, energy attacks, and collection of items that change his ESP abilities or upgrade them. The player must manage the hero's life bar by collecting healing potions dropped by enemies, as it can only be refilled under certain conditions.