Need for Speed ProStreet Cheat Codes From career menu, select CODE ENTRY then SECRET CODE and type in any cheat codes. Press [ENTER]. Some codes may only be used once per career. Code Effect SAFETYNET 5 Free Repair Markers CASHMONEY Add $10,000 REGGAME Add $10,000 plus Bonus Cars COLLECTORSED& Free Collector's Edition Upgrade UNLOCKALLTHINGS Unlock All Bonuses ITSABOUTYOU Unlock Audi TT3.8 Quattro CASTROLSYNTEC Unlock Castrol Syntec Decal HORSEPOWER Unlock Chevrolet Chevelle SS ZEROZEROZERO Unlock Coke Zero Volkswagen Golf GTI ENERGIZERLITHIUM Unlock Energizer Lithium Decal WORLDSLONGESTLASTING Unlock Energizer Lithium Dodge Viper MITSUBISHIGOFAR Unlock Mitsubishi Lancer Evolution 5 Elite Kings Cars Unlockable                                        How to Unlock 06 Mustang GT (Karol Monroe) Beat Drag King in Career Mode. 08 Evo X (Ryo Watanabe) Beat Showdown King in Career Mode. 08 M3 E92 (Ray Krieger) Beat Grip King in Career Mode. 65 GTO (Nate Denver) Beat Speed King in Career Mode. 95 RX-7 (Aki Kimura) Beat Drift King in Career Mode.