You are the proud owner of a rather rusty submarine, on your way to discover the deepest depths of the ocean. Now and then there might be a small leak or another annoyance but that's what you love about your very own submarine, it's a two way relationship giving repairs and in return receiving shelter and transportation. So grab a friend and go on a journey, be careful to stay on track to not end up loosing your valuable progress. Keep your boat intact and reach places nobody has reached before.