Need for Speed: Underground Action Replay Codes (US)
This page is dedicated to all of the Gecko Codes that I have for Need for Speed: Underground (US) on the Nintendo Gamecube. If you don't see the code you're looking for on this page I recommend you check out my Need for Speed: Underground (US) Action Replay Codes instead.
If you are using the Dolphin Gamecube Emulator and struggling to figure out how to get these codes to work, look no further! Check out my How to setup Action Replay Codes on Dolphin or my How to setup Gecko Codes on Dolphin guides. Both of these can provide you the guidance that you need to get your codes working.
Unlimited Extra Nos Usage: 0406C680 60000000
Use this code with the Action Replay one on the other page that gives Unlimited Nos.
Races One Lap: 042F5700 00000001
Nitrous Usage Disabled: 0406C7DC 38000000
Engine Never Blows (Drag Mode): 04076014 60000000
No Traffic: 042F56E0 00000000
Stock Cars Temporarily Unlocked
If you turn code off they become hidden again.
Will stay as main car in Underground Mode if traded for.
Works for Quick Race and Career/Underground Mode.
All Career Cars At Level 3
Decline TJ's offers for parts or it will freeze.
Drift Score Never Fades