UBOOT achievements

Transport a spy to enemy territory.

Research all technologies available in the game during a campaign started on September 1, 1939.

Hit three different ships with torpedoes with a maximum of 120 seconds between the first and last hit.

Have a budget of over 1,000,000.

Sink an enemy battleship moving with a convoy or a warship task force.

Complete the mission of retrieving gold from a sunken merchant ship.

Complete the mission of establishing a weather station in Northern Labrador.

Shoot down 20 airplanes.