Sink your first enemy ship during a campaign.

Sink an enemy destroyer.

Sink an enemy tanker.

Sink a ship and leave the tactical encounter without being detected.

Sink five ships in a single tactical encounter.

Complete your patrol orders and return safely to base.

Return to base with at least 50% structural damage.

Sink 50,000 tons during a single patrol.

Complete ten war patrols.

Travel 1,000 nautical miles during a campaign career.

Sink 100,000 tons during a campaign career.

Sink 500,000 tons during a campaign career.

Evade 25 depth charges during a campaign career.

Complete a lifeguard rescue mission.

Transmit 25 patrol reports.

Survive on active duty until hostilities cease.

Score at least 700 points in AOB Trainer.

Score at least 800 points in AOB Trainer.

Score at least 900 points in AOB Trainer.

Score at least 950 points in AOB Trainer.

Hit a ship with a torpedo after a run of more than 2,500 yards during a campaign encounter.

Win a game of cribbage.

Win 20 games of cribbage.

Sink a ship without surfacing or using the periscope or binoculars during the encounter.

Survive an encounter in which two destroyers actively hunt you.

Sink a ship during a squall.

Hit two different ships within 10 seconds during a campaign patrol encounter.

Hit three different ships within 10 seconds during a campaign patrol encounter.

Travel 10,000 nautical miles during a campaign career.

Successfully complete the Basic Tutorial.

Successfully complete the Advanced Tutorial.

Successfully complete the Campaign Tutorial.