A free program for iPhone, by CAPCOM Co. Ltd.

Shinsekai Into the Depths is a unique game that combines the action of an RPG with the exploration of the underwater world. It has a storyline that will take you through new and exciting views. You will have to fight against enemies and manage your oxygen in order to survive. The gameplay is based on exploration and discovery. You will have to make your way through the underwater ruins, where you will find the remnants of ancient civilizations. You will need to use your tools to find the secrets of the underwater world and to survive.