• Unlock all Arcade Mode content: confidential
• Stronger special ability effects: mmmungo
• Agro ability on all eligible vehicles: ragevirus
• Zone ability on all eligible vehicles: stayontarget
• Roar ability on all eligible vehicles: sushi
• Indestructibility: granite
• Orb biker heads: skidlida
• Pumpkin biker heads: skidlidb
• Bunny biker heads: skidlidc
• Snowman biker heads: skidlidd
• Skull biker heads: skidlide

Prototype-only cheat codes check against the prototype serial. They can be accessed once this check is patched out:

• Unlock everything: all
• Get $4.200.000: cash
• Unlock all cities: cities
• Unlock all car parts: parts
• Unlock all vehicles: cars
• Unlock everything and get $4.200.000: allcash
• Zone ability on all vehicles: zone
• Agro ability on all vehicles: agro
• Roar ability on all vehicles: roar
• Reset the ability cheats: normal
• Display the camera coordinates on the screen: cam
• [no effect]: fps

To unlock the prototype cheat codes in the final game builds, use the following cheats in PPSSPP or in cwCheat on your PSP/PS Vita:

_S ULUS-10383
_G Midnight Club: L.A. Remix [US]
_C1 Unlock prototype cheats
_L 0x20067094 0x00000000

_S ULES-01144
_G Midnight Club: L.A. Remix [EU]
_C1 Unlock prototype cheats
_L 0x20067094 0x00000000

_S ULJS-00180
_G Midnight Club: L.A. Remix [JP]
_C1 Unlock prototype cheats
_L 0x20068A54 0x00000000

_S ULJM-05904
_G Midnight Club: L.A. Remix (Rockstar Classics) [JP]
_C1 Unlock prototype cheats
_L 0x20068A54 0x00000000