Shark Treasure

Shark Treasure is an arcade game (it might be loosely based on a rare Japanese arcade game called Kaitai Takara Sagashi,), and quite a good one. In this game, you are the diver, and you have to dive to the bottom of the ocean and gather gold bars, and bring them back to your boat.

Crossing the waterways below you, however, are ravenous sharks, who, if they get a scent of you, will suddenly jump at you. The only defense you have from this is your flares, which will cause all sharks to reverse direction. Unfortunately, you can only carry 3 things at once, be they gold bars or flares. This makes the journey back up much worse than coming down. As the game progresses, more and more sharks start patrolling the waters as well.