Can You Turn Off the "No Fail" Cheat in Guitar Hero III?

You cannot toggle off a cheat code in Guitar Hero III: Legends of Rock. The game has no built-in cheat management menu—once a cheat is entered (via the “Cheats” screen in Options), it stays active for that session/profile.

Why There’s No Off Switch

• Cheats are simple boolean flags in save data; the UI only offers “Enter Cheat,” not “Remove Cheat.”
• No patch or official tool was ever released to manage them.

What You Can Do

• Don’t enter it. Play fair—improving your timing on Expert is the real reward.
• Start a new save file. Cheats are per-profile; a fresh profile is clean.
• Play online (if servers were up) – multiplayer disabled cheats automatically. (Xbox 360/PS3 servers shut down; Wii never had them.)

If you already used it and want a clean slate, delete the save (Options → Delete Save Data) and begin fresh. The muscle memory you build will last longer than any cheat.