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