It is a sniper-game in deep sea or a game of hide and seek, but with a twist, as the hunter can easily become the hunted. What made this game so special was, that it could change from slow and methodic strategic positioning to frantic and decisive action within the blink of an eye. There was no room for error, if you die, you have to start an hour long mission from the top and every action could have glorious as well as disastrous results. The learning curve was not too steep and the skills you acquired throughout the missions would eventually surpass what was written in the manual. You will be able to tweak the performance of your "little hunting boaty" beyond its listed capabilities and overcome your foes, which become increasingly cunning.