Complete the mission of crossing the Strait of Gibraltar.

Complete the mission of retrieving the Enigma from a sunken U-boat.

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

Complete the mission of infiltrating Scapa Flow.

Complete the mission of attacking Aruba.

Complete the mission of rescuing a Kriegsmarine officer from an interned ship.

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

Complete all stages of the Norwegian campaign.

Complete all stages of the campaign objective The Happy Time.

Complete all stages of the campaign objective Operation Drumbeat.

Complete all stages of the campaign objective Battle of the Mediterranean.

Complete all stages of the campaign objective Southern Routes.

Complete all stages of the campaign objective The Last Stand.

Complete all stages of the campaign objective The Black Pit.

Complete all stages of the campaign objective Tonnage War.

Complete all stages of the campaign objective Arctic Convoys.

Have 10 reputation points.

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

Build all U-boat bunkers in a campaign started before March 1941.

Sink at least 15000 GRT during a single patrol.

Sink an enemy ship by ramming it.

Sink an enemy warship using the deck gun or AA gun.

Cause a tanker to explode while enemy warships are nearby.

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

Sink a total of 3 aircraft carriers travelling in convoys.

Sink 30 destroyers.

Single-handedly sink an entire convoy consisting of at least 10 ships.

Sink a cargo ship requested for sinking by command, which is sailing in a convoy of at least 15 ships, without sinking any other ship in the convoy beforehand.

Earn the Iron Cross 2nd Class with any officer.

Earn the Iron Cross 1st Class with any officer.

Earn the German Cross in Gold with any officer.

Earn the Knight's Cross with any officer.

Earn the Knight's Cross with Oak Leaves with any officer.

Give bags of potatoes to the shipwrecked on a lifeboat.

Shoot down 20 airplanes.

Complete any campaign.

After the war, sink your ship off the coast of Argentina.

Have a budget of over 1,000,000.

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

Survive a battle during which enemy ships dropped over 100 depth charges on your U-boat.

Surface for fresh air after your U-boat has sunk to a depth of at least 100 meters with a displacement of -10% or less.

Transport a spy to enemy territory.

Complete any campaign objective with mine-laying.

Meet a Japanese B1-type submarine.