NOTE! Activating a cheat will permanently prevent the game from
being saved and achievements from being earned.

To activate these codes, press Start, go to Options, then Extras, then Enter
Cheat Code, and enter one of the following:

Unlock all Characters:

At the pause menu:

Coca-Cola Celebrations Codes:

At "My 2010 FIFA World Cup" -> "EA Extras" -> "Unlockable Code Entry", enter one
of the following codes:

Unlock Weapons:

At the Extras -> Preorder menu, enter the following codes to unlock the weapons.

Cheat mode:
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Create a file called "debugconf.scr" then open the new created file with notepad
and insert
the following script.