The River King series is Natsume's second-largest franchise, after Harvest Moon. The fishing RPG goes all the way back to the NES. The latest entry, River King: Mystic Valley, arrives on the Nintendo DS tomorrow.
Players will travel to every body of water imaginable, from ponds to rivers to swamps to hidden fishing holes, to find the mysterious River King. Your little sister has fallen into a deep sleep and the King is the only one who can save her. Along the way you'll make friends and gain their abilities.