Note: This game is also known as - Guitar Hero: Greatest Hits

At the main menu, select "Options", "Cheats", "Enter New Cheat", then enter one of the following codes to unlock the corresponding cheat option. If you entered the code correctly, a message will appear.

Always Slide - Press Blue, Yellow, Red, Green, Blue, Green(2), Yellow. This mode turns all guitar notes (not chords) into touch pad sliding notes connected by purple lines. It has no effect online. Note: This code prevents achievements from being earned.

Always Drum Fill - Press Green(2), Red (2), Blue(2), Yellow(2).

Auto Kick - Press Blue, Green, Red, Yellow, Red, Yellow, Red, Yellow. This mode automatically plays the bass pedal for the drummer. It has no effect online. Note: This code prevents achievements from being earned.

Hyperspeed - Press Red, Green, Blue, Yellow, Green, Yellow, Red(2).

Line 6 Effects - Press Green, Red, Yellow, Blue, Red, Yellow, Blue, Green to unlock additional Line 6 effects in the Music Studio.

Performance mode - Press Blue, Red, Yellow(2), Red(2), Yellow(2). This mode allows you to play without seeing the note highway or rock meter.

Invisible Rocker - Press Blue, Red(4), Yellow, Blue, Green.
Air Instruments - Press Yellow, Red, Blue, Green, Yellow, Red(3).
Flame Color - Press Yellow, Blue, Red, Green, Yellow, Red, Green, Blue.
Gem Color - Press Red(3), Blue(3), Yellow, Green.
Star Color - Press Green, Red, Green, Yellow, Green, Blue, Yellow, Red.
Vocal Fireball - Press Green, Blue, Red(2), Yellow(2), Blue(2).

Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

The Greatest Journey In History (10 points): Complete a song in every venue.
You Cannot Beat Me (20 points): Win an online Pro Face-Off match by 25,000 points or more.
Jaw Dropper (20 points): Win an online Face-Off match by 25,000 points or more.
You Should Be Afraid (10 points): Win an online Face-Off match.
One For All (20 points): Complete a song in a Band (4 players).
Rocker's Guide To Godhood (5 points): Complete the Career Tutorial.
The Greatest Crew (20 points): Complete a song with all Band members on Expert (4 player Band).
Golden Fingers (5 points): Perform as the Guitarist.
Play With Me (20 points): Play 20 online matches.
Low-Pitched King (30 points): Complete the Career as the Bassist.
Thunder Kissing (10 points): Trigger Star Power simultaneously (4 player Band).
Craving For More (5 points): Download a song from GHTunes(SM).
I Wanna Rock (5 points): Complete a song with any instrument on any difficulty in local Quickplay or Career.
Rock Legends (30 points): Complete the Career in a Band (2-4 players).
Promising Diva (5 points): Perform as the Vocalist.
Cowboys From Hell (25 points): Get 100% on a song as a Band (4 players).
Band Leader (10 points): Score the highest individual score in a 4 player Band.
Unyielding (30 points): Complete the Career as the Drummer.
Wondrous Strummer (30 points): Complete the Career as the Guitarist.
Bark At The Moon (30 points): Complete the Career as the Vocalist.
Unnoticed Presence (5 points): Perform as the Bassist.
The One Man Band (35 points): Complete all four instrument Careers on any difficulty.
War Apparatus (25 points): Complete a song on Expert + (Drums only).
Master Craftsman (5 points): Create a new custom instrument.
Artist On The Rise (5 points): Create a new custom Band logo.
Masterpiece (5 points): Create a new custom rocker.
Mooned (5 points): Perform as the Drummer.
There's Hope! (10 points): Recover from a poor performance.
Clash Of The Titans (15 points): Win a Band vs. Band match (8 players).
Ink And Blood (5 points): Create a custom tattoo.
Glory to the Daring (10 points): Play a song in the Atlantis venue.
Face To Face (10 points): Win an online Pro Face-Off match.
Killing In The Name (45 points): Win 50 online matches.
Rock Veteran (20 points): Play 150 songs throughout your entire Career.
Amazing Rockstar (100 points): Complete single player Expert Career on all instruments.
Smoking!!! (10 points): Complete the song Smoke On The Water as the Vocalist.
Deadzone (10 points): Fail a song with available Star Power in single player.

Additionally, there are thirteen secret achievements:

Cyborg (45 points): You got a 100 note streak in the song Through The Fire And Flames on Hard or higher as the Drummer.
That was Close! (10 points): You won a song with the rock meter in red.
8th Wonder (35 points): You completed the song Through The Fire And Flames with 4 stars or more as the Guitarist on Expert.
Lightning Speed! (25 points): You completed the song YYZ with 5 stars on Expert Bass.
Hail The Reverend (10 points): Get 5 stars on the song Beast And The Harlot as the Drummer on Expert without using Star Power.
You Play It Well (35 points): You perfectly played the Let's Play! section in the song Play With Me as a lead Guitarist on Expert.
Raining Notes (35 points): You perfectly played the First Blood section of the song Raining Blood as the guitarist on Expert.
Inhuman (10 points): You scored 5 stars in a song on Expert with Lars Umlaut in single player.
Rising Star (20 points): You completed 100% on any song on Expert in single player.
Free As A Band (35 points): You scored 2,000,000 points on Free Bird as a Band.
Golden Voice (35 points): You scored 95% or more on the song Killer Queen as the Vocalist (Expert).
Open Minded Strummer (10 points): You hit all Open Strum notes in the song Laid To Rest as the Bassist.
Bloody Feet (35 points): You completed the song Raining Blood with 5 stars as the Drummer on Expert+.