WWII tactical submarine combat!
Take command of a U-boat prowling the Atlantic in search of enemy convoys to sink. Sneak past the escorts and torpedo the transports. Or surface and use your deck gun in a daring night attack.
When the escorts come after you, drop decoys and sneak away before they can crush you with their depth charges.
Jump in for a quick convoy encounter, or launch a full-length War Patrol, seeking out the biggest, most valuable targets.