Worms: Open Warfare (Sony PSP)
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Refill Health
Hold down L + R and press Y, Down, A, Up while playing the game (You must press pause).
Unlock Challenge one
Finish all 3 tutorials.
Unlock Next challenge
Finish a Challenge to unlock the next one.
Unlocks All Stars Team
Pause the game and input the following code to achieve the corresponding effect. Go to Challenges and press: X, X, O, X.