Naval Ops: Commander cheats and cheat codes for Playstation 2

Unlockable List

25.4cm Deck Guns 60-caliber: Destroy 100 PT Boats. 
30mm CIWS: Destroy 100 Destroyers. 
365 mm Chain Gun: Destroy 999 Aircraft. 
80 cm 60 cal: Destroy 500 PT Boats. 
AGS 203mm Cannon: Destroy 999 Destroyers. 
AGS 254 mm Cannon: Destroy 500 Aircraft. 
Atomic Engine E: Beat mission F-B 
Black Dragonfly Airship: Reach an "A" rank in mission *G1. 
Breac Wave Gun: Complete level *G10 with an "A" rank.
Breac Wave Gun #2: Complete level *G9 with "A" rank.
Burst Torpedoes: Destroy 100 Cruisers. 
Crab Laser: Destroy 100 Battle Carriers
Cruise Missile Launcher: Destroy 500 Battleships. 
Double-hulled Battleship: obtain an "A" rank in mission *G7. 
Double-hulled Battleship #2: Reach an "S" grade in level *D6. 
Drillship: Get an "A" rank on "Face To Face". 
Duck or Cygnus Escort Ships: Reach an "S" rank in mission *G8 
Duckling Escort Ship: Reach an "A" rank in mission *G8. 
Ealta Railgun: Reach an "S" rank in level *9B.
EM Shield B: Reach an "S" rank in mission *F3.
Enigmatech Solvi: Reach an "A" rank in mission *F3. 
Enigmatech Sturla: Destroy 999 Submarines.
Float escort ship: Reach an "A" rank in mission *G5.
Four 1-116 Condors (aircraft): Destroy 500 Carriers. 
Good Luck Charm: Destroy 500 Submarines. 
Gravitational Fieldb: Reach an "S" rank in mission *G3. 
Grian Laser: Destroy 999 Battle Carriers. 
KaRyuu Aircraft: Destroy 100 Carriers. 
Laser Duck Escort Ship: Reach an "S" rank in mission *G2. 
Massive Wave Gun: Destroy 999 Superships. 
Multi-Warhead VLS: Destroy 100 Battleships. 
Multi-Warhead VLS: Destroy 100 Battleships. 
Mystery Raft Escort Ship: Reach an "S" rank in mission *G5. 
Nessie Escort Ship: Reach an "A" rank in mission G2. 
New Crab Laser: Reach an "S" rank in mission G6. 
New Quantum Torpedos: Destroy 999 Cruisers. 
P38EX Airship: Reach an "S" rank in mission G1. 
Pocket Battleship: Destroy 500 Transports. 
Railgun Astal: Destroy 100 Superships. 
Rapid Fire 102mm Cannon: Destroy 500 Destroyers. 
Rapid Fire 127mm Cannon: Destroy 100 Aircraft. 
Report Falsifier: Reach an "A" rank in mission *F4. 
Siorc Wave Gun: Complete level *G10 with an "S" rank.
Siorc Wave Gun: Complete level *G9 with an "S" rank.
Siorc Wave Gun: Destroy 500 Superships. 
Special Warhead Torpedoes: Destroy 500 Cruisers. 
Super Kitty Beam: Reach an "A" rank in mission *G6.
Two Hull Destroyer: Destroy 100 Transports. 
Wave Gun: Get an S rank on F-10 
X Battle Carrier: Reach an "S" rank in mission *G7. 

Bonus unlocks: 
You will sometimes get different items for a "A" and "S" rank in some 
missions. Replay them and you may find new things. 

Easy "S" rank: 
Take three of the lowest experience costing escorts and make sure they 
survive the mission. Just dump them off at a safe location and complete 
the mission. Having them alive increases your score