Operation Wolf

Cheat mode:
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Press [F10] at the high score screen to enable cheat mode.
The text “High Scores” will change to “Firm Help” to confirm
correct code entry. Press one of the following keys during
game play to activate the corresponding cheat function.
Effect       Key
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Health and ammo [F7]
Level skip     [F8]
Invincibility   [F9]
Extra ammunition:
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Shoot the animals (eagles, pigs, etc.) during game play to
collect more ammunition.