Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Accumulator	Earn one hundred million warbonds in a single campaign.
Against the odds	Sink three combat ships in battle when commanding a single ship.
Atlantic Cross	Complete the Atlantic Campaign as Germany.
Atlantic Star	Complete the Atlantic campaign as USA or Britain.
Blood, Toil, Tears and Sweat	Complete a campaign on Expert difficulty.
Captured Captain	Capture an enemy captain.
Captured Enemy Operative	Capture an enemy operative.
Captured the Flag	Capture fifty ports.
Covert Intelligence	Recover covert intelligence.
Crossing the T	Sink one hundred ships in campaign mode.
Destroyer Destroyer	Sink twenty destroyers in campaign mode.
History Buff	Win all the historical battles.
Honor, Courage, Commitment	Complete a campaign on Hard difficulty.
Mediterranean Star	Complete the Mediterranean campaign as USA or Britain.
Money Maker	Earn five hundred million warbonds in a single campaign.
Pacific Rising Sun	Complete the Pacific Campaign as Japan.
Pacific Star	Complete the Pacific campaign as USA or Britain.
Risk Taker	Sink six combat ships in battle when commanding a single ship.
Sea King	Own at least one ship of every category.
Ship Wreck	Sink to the bottom of the sea.
War Hero	Complete all the campaigns.
Warlord	Sink ships from each ship category.
Wolf Pack	Sink at least four enemies in combat with a fleet of submarines.