Blazing Angels: Squadrons of WWII

Invincibility
Pause the game during the mission then:
Hold L2 and press Square, Triangle, Triangle, Square release L2 and hold R2 and press Triangle,
Square, Square, Triangle.

Unlock Everything
At the title menu:
Hold L2 and R2 then press Square, L1, R1, Triangle, Triangle, R1, L1, Square.

Increase Weapon Damage
Pause the game during the mission then:
Hold L2 and quickly press L1, L1, R1, release L2 then hold and press R1, R1, L1.