At the 'Main' menu select 'Options' and go to 'Cheats'. Then highlight the 'Retail Codes' option and enter one of the following codes to activate the corresponding effect.
Unlock ALL Characters: Enter the code uNA2
Unlock ALL Decks: Enter the code LAuP
Unlock ALL Headphones: Enter the code 62Db
Unlock ALL Songs: Enter the code 82xI
Unlock ALL Venues: Enter the code Wv1u
Unlock Use any DJ any Set: Enter the code 0Jj8
Unlock Daft Punk and Mixes: Enter the code D1G?
Unlock DJ AM: Enter the code k07u
Unlock DJ Jazzy Jeff: Enter the code n1fz
Unlock DJ Shadow: Enter the code oMxV
Unlock DJ Z-Trip and Mixes: Enter the code 5rtg
Unlock Grandmaster Flash: Enter the code Ami8
Unlock Auto Crossfader: Enter the code S15d
Unlock Auto DSP: Enter the code ab1L
Unlock Auto Euphoria: Enter the code r3a9
Unlock Auto GemHit: Enter the code ZitH
Unlock Auto Scratch: Enter the code IT6j
Unlock Bedroom DJ: Enter the code g7nH
Unlock Blank Plinths: Enter the code ipr0
Unlock BWNoise: Enter the code b!99
Unlock Edge Detect: Enter the code 2u4u
Unlock Hamster Switch: Enter the code 7gE0
Unlock Invisible DJ: Enter the code oh5T
Unlock Midas: Enter the code 4pe5
Unlock No More Black: Enter the code d4kR
Unlock Rainbow: Enter the code ?jy!
Unlock RedBull: Enter the code 76st
Unlock Short Deck: Enter the code S1uC
More tricks, tips and cheats for this game are right here - DJ Hero cheats