Win an ordinary battle for the first time.

Win an elite battle.

Capture an enemy fortress.

Capture all eight fortresses across campaigns.

Win a campaign.

Win as each of the four nations.

Win the US national showdown.

Win the Japanese national showdown.

Win the British national showdown.

Win on Standard difficulty or higher.

Win on Rough Seas difficulty or higher.

Win on Blockade difficulty or higher.

Win on Desperate difficulty.

Win the German national showdown.

Sink a transport and win an interception mission.

Win a convoy mission with the convoy afloat.

Win a breakthrough mission.

Destroy an enemy by turn three and win a raid.

Win a landing mission.

Sink the flagship and win a pursuit mission.

Win a battle without losing fleet hull.

Win with one to ten hull before post-battle repairs.

Win a non-introductory battle by turn three.

Win during a night turn.

Destroy a radar station and win the battle.

Sink an enemy carrier and win the battle.

Upgrade a command card.

Refit a command card.

Remove a card at a shop.

Gain your first research.

Hold five research items in one campaign.

Acquire a legendary command card.

Unlock an archive item.

Equip a ship or aircraft appearance.

Unlock ten distinct basic archive items.

Complete one nation's basic archive collection.