Atomic Engine Alpha:
Kill 100 Destroyers to unlock the Atomic Engine Alpha.

Atomic Engine E:
Kill 500 Destroyers to unlock the Atomic Engine E with the following stats: Output: 22,000, Weight 600.

Charged Particle Gun 3:
Kill 100 Battleships to unlock the Charged Particle Gun 3.

Enigmatech Atli:
Kill 100 Submarines to unlock the Enigmatech Atli, with the following abilities: Top Speed +10%, Rudder Response +1, Control Ability +25%, Endurance +500.

Twin Hull Battleship:
Kill 500 Transports to unlock a Twin Hull Battleship.

Twin Hull Cruiser:
Kill 100 Transports to unlock a Twin Hull Cruiser with a 10,000 ton weight limit.

Wave Gun:
Kill 100 Superships to unlock the Wave Gun. It has the following stats: Offense: 18,000, Range: 20,000, Weight: 4,000, Reload time: 1,000, Ammo: 5.

203mm Chain Gun:
Kill 100 Aircraft as the Japanese to unlock the 203mm Chain Gun. It has the following stats: Offensive: 400, Weight: 100, Range: 3500, Ammo: 5000, only available for Battleships or Battle Carriers.

30mm CIWS:
Kill 100 Aircraft as the Americans or Germans to unlock the 30mm CIWS.

356mm Chain Cannon:
Kill 500 Aircraft as the Japanese to unlock the 356mm Chain Cannon.

46cm 60 Caliber Deck Gun:
Kill 100 PT Boats to unlock the 46cm 60 Caliber Deck gun, only available for Battleships and Battle Carriers.

80cm Guided Torpedo:
Kill 100 Cruisers to unlock the 80cm Guided Torpedo