Unlockables
All aircraft/missions/paint jobs

At the menu immediately following the choose pilot.
Code 	Effect
Press & Hold (-) & (+), then press (D-Pad) left, right, 1, 2(x2), 1 	A text message will appear at the top of the screen;
\"All aircraft and campaigns are unlocked\". Also, all paint jobs including \"Air Marshall\".

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God Mode, More Weapons damage

Pause the game during any mission or mini-game:

God mode: Press and hold (-) then 1,2,1,2 a message will appear

Weapons Damage: Press and hold (-) then 2,1,1,2 a message will appear

This works for every part of the game including all mini-games plus you will be able to save 
you need to do this for each mission or mini game with each plane you choose.
Code 	Effect
Press (-) 1,2,1,2 	God mode
Press (-) 2,1,1,2 	Weapons damage increase

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Additonal Flyable Aircraft & Upgraded Weapons

Unlocking the two mini campaigns (Dogfight & Bombing) is accomplished by beating the main campaign mode. 
Each mini campaign contains six missions. Once all six are complete, two more aircraft (per mini campaign) are unlocked. 
In addition, the weapons of the aircraft can be upgraded by completing the two mini campaigns.
Unlockable 	How to Unlock
B-25 Mitchell & Hs-129 	Complete the Bombing Mini Campaign
Me-262 Schwalbe (Sparrow) & Me-163 Komet 	Complete the Dogfight Mini Campaign
Upgraded bombs, rockets, & torpedos for all aircraft 	Complete the Bombing Mini Campaign
Upgraded cannons & machine guns for all fighters 	Complete the Dogfight Mini Campaign

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Flyable Airplanes

Completing the campaign missions with certain rankings unlocks new aircraft after each mission. 
Simply beating the mission unlocks the first of the two aircraft, 
while a Veteran Pilot ranking is required to attain the second. 
The rankings are given with stars, with the maximum number being five and the minimum being one. 
Three stars are required for a Veteran Pilot ranking.
Unlockable 	How to Unlock
B-17 Flying Fortress & Spitfire IX 	Complete Campaign Mission 18 - Counter Attack with at least a Veteran Pilot Ranking
Beaufighter & P-40C Warhawk 	Complete Campaign Mission 6 - Desert Rats with at least a Veteran Pilot Ranking
Boulton-Paul Defiant & Ki-43 Hayabusa (Oscar) 	Complete Campaign Mission 10 - Midway: Turning Point with at least a Veteran Pilot Ranking
De Havilland (DH) Mosquito & N1K Shiden (George) 	Complete Campaign Mission 13 - Rabaul Raid with at least a Veteran Pilot Ranking
Devastator & D3A1 Val 	Complete Campaign Mission 7 - Day of Infamy with at least a Veteran Pilot Ranking
Dornier Do-335 Pfeil (Arrow) 	Complete Campaign Mode
F2A Buffalo & B5N2 Kate 	Complete Campaign Mission 8 - Surprise Attack with at least a Veteran Pilot Ranking
Fw-190A & Me-109G 	Complete Campaign Mission 14 - Preemptive Strike with at least a Veteran Pilot Ranking
Hurricane I & Me-110C 	Complete Campaign Mission 1 - Training Day with at least a Veteran Pilot Ranking
Hurricane II & Me-110E 	Complete Campaign Mission 5 - Desert Recon with at least a Veteran Pilot Ranking
Meteor & Kikka 	Complete Campaign Mission 20 - Berlin 1945 with at least a Veteran Pilot Ranking
P-51D Mustang & Me-109K 	Complete Campaign Mission 16 - D-Day Normandy with at least a Veteran Pilot Ranking
P-51H Mustang & Fw-190D-9 	Complete Campaign Mission 19 - Flying Fortresses with at least a Veteran Pilot Ranking
P-82 Twin Mustang & J2M Raiden (Jack) 	Complete Campaign Mission 12 - The Battle of New Georgia with at least a Veteran Pilot Ranking
SB2C Helldiver & SB2A Buccaneer 	Complete Campaign Mission 11 - Holding Guadalcanal with at least a Veteran Pilot Ranking
SBD-3 Dauntless & A6M Zero 	Complete Campaign Mission 9 - Midway: Opening with at least a Veteran Pilot Ranking
Seafire & Ju-87 Stuka 	Complete Campaign Mission 4 - London 1940 with at least a Veteran Pilot Ranking
Spitfire I & Me-109E 	Complete Campaign Mission 2 - Skies of Dunkirk with at least a Veteran Pilot Ranking
Swordfish & Spitfire V 	Complete Campaign Mission 3 - Dunkirk Evacuation with at least a Veteran Pilot Ranking
Tempest & A-1 Skyraider 	Complete Campaign Mission 17 - Paris: La Liberation with at least a Veteran Pilot Ranking
Typhoon & Me-110G 	Complete Campaign Mission 15 - Top Secret with at least a Veteran Pilot Ranking