Unlock all aircraft
Install all armor on an aircraft carrier
Destroy 20 enemy buildings
Upgrade your aircraft carrier to the maximum
Destroy 500 enemy aircraft
Destroy an enemy aircraft by ramming it
Win the first mission
Defeat the first enemy carrier
Win all missions on the entire map
Build torpedoes
Build Emi torpedoes
Defeat 20 enemy carriers
Collect 10,000 resources
Destroy the enemy fleet in a mission
