Use a text editor to create a file named "local.ini" in the game folder. Add one of the following lines to the "local.ini" file to activate the corresponding cheat function. Note: You can also disable a code by using "=FALSE" instead of "=TRUE" in the text entry.
Result
local.ini entry
All cars in episodes/seasons FE_UNLOCK_ALL_CARS=TRUE

Always advance to next mission CanAlwaysPlayNext=TRUE

Can skip conversations CanSkipConversations=TRUE

CPU auto-play PlayerUseAI=TRUE

Create super profile FE_CREATE_BEST_PROFILE=TRUE

Disable all sound DisableAllSound=TRUE

Disable conversations PlayConversations=FALSE

Disable gun icon in HUD TurnOffThatFeckingStupidGunIcon=TRUE

Disable most civilian traffic UpdateCivilianTraffic=FALSE

Disable skid marks DISABLE_SKID_MARKS=TRUE

Free Roam mode FE_ENABLE_FREE_ROAM=TRUE

Locker FE_ENABLE_LOCKER=TRUE

Maximize visual range MaxVR=TRUE

Monstertruck MONSTER_TRUCK=TRUE

Never run out of visual range NeverRunOutOfVR=TRUE

Show HUD Show_HUD=TRUE

Skip video card selection screen SKIPDEVICESELECTION=TRUE

Speed mode SPEED_CHEAT=TRUE

Start game paused StartGamePaused=TRUE

TV Specials FE_ENABLE_TV_SPECIAL=TRUE

Wide wheels CARLOS_FANDANGO=TRUE

Wobbly car FUNNYBONES=TRUE

Unknown FE_SEASON1_ACCESS=TRUE

Unknown FE_SEASON2_ACCESS=TRUE

Unknown FE_SEASON3_ACCESS=TRUE

Unknown RAYGUNS=TRUE

Unknown JIVETALK=TRUE

Unknown LO_RIDER=TRUE

Unknown CRAZY_TAXI=TRUE

Unknown PROGRAMMERART=TRUE

Unknown KnightRider=TRUE

Unknown Paparazzi=TRUE

Unknown FE_CRUNTYS_MOM_HAS_THE_SHAKES=TRUE

Unknown OnlyPlayDebugEnabledEffects=TRUE

Unknown DISABLE_LEVEL_COMPLETE=TRUE

Unknown DISABLE_FRONTEND=TRUE

Unknown DisableVRPowerups=TRUE

Unknown DISABLE_BODYPARTS=TRUE

Unknown DISABLE_DAM_FILES=TRUE

Unknown DISABLE_IsInView=TRUE

Unknown FE_BADGE_VR=TRUE

Unknown FE_SKIP_THROUGH_TEST=TRUE

Unknown FE_USE_INI_STARTLEVEL=TRUE

Unknown PAUSE_MENU=TRUE

Unknown SHOW_FPS_BAR=TRUE

Unknown Subtitles=TRUE

Unknown MiniMapMode=TRUE

Unknown FullScreenOnly=TRUE

Unknown ALLOW_PLAYER_ROLL=TRUE

Unknown BUTT_2WHEELS=TRUE

Unknown BUTT_ACCELERATE=TRUE

Unknown BUTT_BRAKE=TRUE

Unknown BUTT_HANDBRAKE=TRUE

Unknown BUTT_LAZER=TRUE

Unknown BUTT_MISSILE=TRUE

Unknown BUTT_SHOOT1=TRUE

Unknown BUTT_SHOOT2=TRUE

Unknown BUTT_SHOOT3=TRUE

Unknown BUTT_TURBO=TRUE

Unknown DisplayLoadingProgress=TRUE

Unknown DopplerEffect=TRUE

Unknown DoSpawnTest=TRUE

Unknown EDITOR_ALLOWED=TRUE

Unknown EnableScriptedCameras=TRUE

Unknown ENABLE_LANGUAGE=TRUE

Unknown IOPDebug_Errors=TRUE

Unknown IOPDebug_ExtraReports=TRUE

Unknown IOPDebug_Reports=TRUE

Unknown IOPDebug_Warnings=TRUE

Unknown MONOPLAY=TRUE

Unknown MoveCamerasInPauseMode=TRUE

Unknown MUSIC=TRUE

Unknown OurDebug_Errors=TRUE

Unknown OurDebug_ExtraReports=TRUE

Unknown OurDebug_Reports=TRUE

Unknown OurDebug_Warnings=TRUE

Unknown PlayerAISkill=TRUE

Unknown PLAYER_MESH=TRUE

Unknown PlayMovies=TRUE

Unknown ProcessorIntensiveEffects=TRUE

Unknown RenderLensFlare=TRUE

Unknown RepeatLastSpawn=TRUE

Unknown ReportDialogFile=TRUE

Unknown SFX=TRUE
Unknown SHADOW_DEBUG_ERRORLOCK=TRUE

Unknown SHADOW_DEBUG_LOG=TRUE

Unknown SHADOW_DEBUG_ONSCREEN=TRUE

Unknown ShowCameras=TRUE

Unknown ShowFreeMemory=TRUE

Unknown ShowReportDialog=TRUE

Unknown UseWAD=TRUE

Unknown UseWholeCityLOD=TRUE

Unknown VOICE=TRUE