These are on like every site in the world, gamefaqs, etc...
Only found a few myself but not like I had to add them to the list...
GAME CODES:
ALL COSTUMESCode:Invincibility Enter "CORTOSIS" as a code. Infinite Force Enter "VERGENCE" as a code. 1,000,000 Force point Enter "SPEEDER" as a code. All Force powers Enter "TYRANUS" as a code to unlock all Force powers. Maximum Force power level Enter "KATARN" as a code. Maximum combo level Enter "COUNTDOOKU" as a code. Amplified damage Enter "LIGHTSABER" as a code. New combo Enter "MARAJADE" as a code.
SINGLE COSTUME UNLOCKSCode:All costumes Enter "GRANDMOFF" as a code to unlock all costume.
OTHER:Code:Kento's robe Enter "WOOKIEE" as a code to unlock Kento's robe. Ceremonial Jedi robes Enter "DANTOOINE" as a code to unlock the Ceremonial Jedi robes. Sith robes Enter "HOLOCRON" as a code to unlock the Sith robes. Sith Stalker armor Enter "KORRIBAN" as a code to unlock the Sith Stalker armor. Play as 501st Legion Enter "LEGION" as a code to unlock 501st Legion. Play as Aayla Secura Enter "AAYLA" as a code to unlock Aayla Secura. Play as Admiral Ackbar Enter "ITSATWAP" as a code to unlock Admiral Ackbar. Play as Anakin Skywalker Enter "CHOSENONE" as a code to unlock Anakin Skywalker. Play as Asajj Ventress Enter "ACOLYTE" as a code to unlock Asajj Ventress. Play as Chop'aa Notimo Enter "NOTIMO" as a code to unlock Chop'aa Notimo. Play as Classic stormtrooper Enter "TK421" as a code to unlock Classic stormtrooper. Play as Count Dooku Enter "SERENNO" as a code to unlock Count Dooku. Play as Darth Desolous Enter "PAUAN" as a code to unlock Darth Desolous. Play as Darth Maul Enter "ZABRAK" as a code to unlock Darth Maul. Play as Darth Phobos Enter "HIDDENFEAR" as a code to unlock Darth Phobos. Play as Darth Vader Enter "SITHLORD" as a code to unlock Darth Vader. Play as Drexl Roosh Enter "DREXLROOSH" as a code to unlock Drexl Roosh. Play as Emperor Palpatine Enter "PALPATINE" as a code to unlock Emperor Palpatine. Play as General Rahm Kota Enter "MANDALORE" as a code to unlock General Rahm Kota. Play as Heavy trooper Enter "SHOCKTROOP" as a code to unlock Heavy trooper. Play as Juno Eclipse Enter "ECLIPSE" as a code to unlock Juno Eclipse. Play as Kleef Enter "KLEEF" as a code to unlock Kleef. Play as Lando Calrissian Enter "SCOUNDREL" as a code to unlock Lando Calrissian. Play as Luke Skywalker Enter "T16WOMPRAT" as a code to unlock Luke Skywalker. Play as Luke Skywalker (Yavin) Enter "YELLOWJCKT" as a code to unlock Luke Skywalker (Yavin). Play as Mace Windu Enter "JEDIMASTER" as a code to unlock Mace Windu. Play as Mara Jade Enter "MARAJADE" as a code to unlock Mara Jade. Play as Maris Brood Enter "MARISBROOD" as a code to unlock Maris Brook. Play as Navy commando Enter "STORMTROOP" as a code to unlock Navy commando. Play as Obi Wan Kenobi Enter "BENKENOBI" as a code to unlock Obi Wan Kenobi. Play as Proxy Enter "HOLOGRAM" as a code to unlock Proxy. Play as Qui Gon Jinn Enter "MAVERICK" as a code to unlock Qui Gon Jinn. Play as Shaak Ti Enter "TOGRUTA" as a code to unlock Shaak Ti. Play as Shadow trooper Enter "INTHEDARK" as a code to unlock Shadow trooper. Play as Twi'lek Enter "SECURA" as a code to unlock Twi'lek Play as General Rahm Kota Enter "MANDALORE" as a code to unlock General Rahm Kota.
Code:SITH LORD MODE: Successfully complete the game to unlock the Sith Lord difficulty. JEDI ROBE: Successfully complete the game with the Jedi ending to unlock the Jedi robe.