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