Submarine games where you take the role of a German U-Boat captain in WWII. You get to hunt around on and below the waves for ships to sink all while trying to avoid the destroyers sinking you. After each patrol you get experience that you can use to improve your boat and crew. That is really needed as it feels like most of your crew has spent to much time sniffing diesel fuel and they do not understand the most basic operations needed. There should be a I do not care option for the crew management part of the game.