This naval game takes you back to World War II. You can either play on the German side and command one or more submarines (U-boats), or you can play on the side of the Allies and command one ship or a convoy (usually a combination of Destroyers, Freighters and/or Tankers). You can change settings for each mission (try playing in the dark!), but you can also create your very own missions and save them to disk. The game plays very well on modern Macs, but you'll probably spend a while figuring out the interface. Tip: clicking in the top-left corner of the screen will take you back to the main screen.
Minimum requirements: 68020 or later, 4MB RAM, System 6.0.7 or later with Color QuickDraw, 8-bit 12" or larger color monitor. Runs in Classic Mode on OS X.