Here is the full list of all 23 Victory At Sea achievements.
Complete the Atlantic Campaign as Germany.
Sink six combat ships in battle when commanding a single ship.
Complete a campaign on Hard difficulty.
Complete the Pacific Campaign as Japan.
Sink three combat ships in battle when commanding a single ship.
Sink to the bottom of the sea.
Complete the Pacific campaign as USA or Britain.
Own at least one ship of every category.
Capture fifty ports.
Earn five hundred million warbonds in a single campaign.
Sink ships from each ship category.
Earn one hundred million warbonds in a single campaign.
Sink one hundred ships in campaign mode.
Capture an enemy captain.
Sink twenty destroyers in campaign mode.
Capture an enemy operative.
Recover covert intelligence.
Complete the Atlantic campaign as USA or Britain.
Complete the Mediterranean campaign as USA or Britain.
Complete all the campaigns.
Win all the historical battles.
Complete a campaign on Expert difficulty.
Sink at least four enemies in combat with a fleet of submarines.