Madden NFL 07 - Platform: Nintendo DS

Easy mode:
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At the main menu, hold Right until the "New Game" option turns green. Start a 
game and double the normal amount of items, including ink ribbons and 
ammunition, will be available. Note: This does not effect other items, such as 
health sprays or herbs.

Additionally, after selecting "New Game", hold Right on "Rebirth Mode" until it 
turns green to play both Rebirth and Classic modes on the easy difficulty 
setting. 

Masters Of Knifing mini-game:
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Successfully complete the game to unlock the Masters Of Knifing mini-game. 

Play as Albert Wesker in Multiplayer mode:
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Get a "B" or greater rank in the Masters Of Knifing mini-game to unlock Albert 
Wesker in Multiplayer mode. 

Play as Barry Burton in Multiplayer mode:
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Successfully complete Rebirth mode with Jill to unlock Barry Burton in 
Multiplayer mode. 

Play as Enrico Marini in Multiplayer mode:
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Successfully complete all Co-Op levels in Multiplayer mode to unlock Enrico 
Marini in Multiplayer mode. 

Play as Forest Speyer in Multiplayer mode:
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Successfully complete Classic mode with Jill to unlock Forest Speyer in 
Multiplayer mode. 

Play as Kenneth J. Sullivan in Multiplayer mode:
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Successfully complete Classic mode with Chris to unlock Kenneth J. Sullivan in 
Multiplayer mode. 

Play as Rebecca Chambers in Multiplayer mode:
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Successfully complete Rebirth mode with Chris to unlock Rebecca Chambers in 
Multiplayer mode. 

Play as Richard Aiken in Multiplayer mode:
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Successfully complete all Versus mode levels in Multiplayer mode to unlock 
Richard Aiken in Multiplayer mode. 

Alternate costumes:
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Successfully complete Jill Valentine's scenario with Barry Burton alive or Chris 
Redfield's scenario with Rebecca Chambers alive. Save the game, then load the 
cleared game file to start with the Special Key in your inventory. Use it to 
unlock the closet in Mansion 1F to access the alternate costumes. Note: The 
alternate costumes are different in Classic and Rebirth modes.