Take control of every aspect of a U-boat, from the torpedo data computer to the deck gun.
While it is an older title (released in 2001), it laid the groundwork for the modern sub-sim genre.
Since the game is still under copyright, "free" versions found on abandonware sites are often unsupported. For the best experience on modern Windows systems, it is highly recommended to purchase the digital version from stores like GOG or Steam , which include the necessary patches to make the game run on current hardware.