Sink twenty destroyers in campaign mode.
Sink one hundred ships in campaign mode.
Capture fifty ports.
Sink to the bottom of the sea.
Complete the Atlantic campaign as USA or Britain.
Complete the Pacific campaign as USA or Britain.
Complete the Mediterranean campaign as USA or Britain.
Complete all the campaigns.
Win all the historical battles.
Earn one hundred million warbonds in a single campaign.
Earn five hundred million warbonds in a single campaign.
Sink three combat ships in battle when commanding a single ship.
Sink six combat ships in battle when commanding a single ship.
Sink ships from each ship category.
Own at least one ship of every category.
Recover covert intelligence.
Capture an enemy captain.
Capture an enemy operative.
Complete the Atlantic Campaign as Germany.
Complete the Pacific Campaign as Japan.
Complete a campaign on Hard difficulty.
Complete a campaign on Expert difficulty.
Sink at least four enemies in combat with a fleet of submarines.
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