Control the newest submarine the Deep Abyss, please collect the radioactive waste dumped in the deep sea! Searching for radioactive waste dumped in the deep sea using sonar and torpedoes and your senses. Various obstacles will interfere with your search. It consists of a 50 normal missions, 50 hard missions and more challenge missions. Use a mission rewards, you can upgrade the Deep Abyss. Please try to get a clean sea! Some of the profits will be donated for the clean sea