In the main screen, select Extras, Promotional Unlocks, and type as the following codes.

Effect	Code
Unlocks 1st promo card for every deck	GKSNDR
Unlocks 2nd promo card for every deck	DWNNDR
Unlocks 3rd promo card for every deck	TRCKSC
Unlocks 4th promo card for every deck	FTHPTH
Unlocks 5th promo card for every deck	PRSTTT