Guide your submarine to explore vast oceans in search of hidden treasure, defeating dangerous sea creatures along the way.
You are a deep-sea expedition scientist, you have to drive your submarine to go deep-sea adventure, pay attention to avoid the ferocious animal deep inside, and you must pay attention to cross the border after upgrade your submarine, oh, we come to drive a submarine to explore the unknown deep right field.
Target: Driving submarine to explore the unknown deep-sea areas
