Brothers In Arms: Earned In Blood Codes -

Cheat mode:
In the North American version, enter 2ndsquad as a profile name to unlock all levels and extras including "Infinite Ammunition", "Super Squad", and "Old Movie" modes.

Full team health:
Die four times after a save point and you will be asked if you want to heal your squad.

Alternately, enter BAKERSDOZEN as a profile name.