Enter the following codes at the code screen to unlock the corresponding effect...
LORDOFSITH or 1WITHFORCE:Invincibility.
LETSDANCE:Unlock all multiplayer missions.
GOTPOPCORN:Unlock all cutscenes.
ALITTLEHELP:Gives player three bonus objectives.
CARBONCOPY:Unlocks Clone in Geo Academy.
FODDER:Unlocks Battledroid in Geo Academy.
FRAGFIESTA:Unlock All Multiplayer Maps
ROGERROGER:Play as Battle Droid (go to Geonosis Academy to pick one)
FUZZBALL: Play as a Wookie (go to Geonosis Academy to pick one)