These extra characters are got by beating them in a Guitar Battle during Career mode and then purchasing them at the shop.

Unlock Slash:
Beat his boss Battle and then buy him at the Shop for $10,000.

Unlock Tony Morello:
Beat his Boss Battle and then buy him at the Shop for $10,000.

Unlock Lou:
Beat his Boss battle and then buy him at the Shop for $15,000.

To enter the notes go to 'Options' and select 'Cheat' and enter the code you want to enable. You have to strum as you press the buttons in the code or if two buttons are indicated they must be pressed together as you strum as they represent one cord. The letters in the code below correspond to the coloured frets.

R = Red, B = Blue, G = Green, Y = Yellow, O = Orange

Unlock Everything:
Press GR_BO, GRYB_, GRY_O, G_BYO, GRYB_, _RYBO, GRYB_, G_YBO, GRYB_, GRY_O, GRY_O, GRYB_, GRY_O (because this code uses 4-note chords there will be no sound).

Unlock Air Guitar Mode:
Press BY, GY, GY, RB, RB, RY, RY, BY, GY, GY, RB, RB, RY, RY, GY, GY, RY, RY.

Unlock No Fail Mode:
Press GR, B, GR, GY, B, GY, RY, O, RY, GY, Y, GY, GR. In this mode you won't fail any song regardless of difficulty setting (this code doesn't work with Career mode, Online or Top scores online).

Unlock Easy Expert:
Press GR, GY, YB, RB, BO, YO, RY, RB (the timing window becomes larger for hitting notes, this code doesn't work in Single career mode).

Unlock Bret Michaels as the Singer:
Press GR, GR, GR, GB, GB, GB, RB, R, R, R, RB, R, R, R, RB, R, R, R (using this code on Online gameplay has been known to cause a glitch).

These guitars and bass are unlocked when you have completed the correspoding task in Career mode in the indicated difficulty setting.

Unlock Moon Shot Guitar:
Complete Career in Easy mode.

Unlock Saint George Guitar:
Complete Career in Medium mode.

Unlock Rojimbo Guitar:
Complete Career in Hard mode.

Unlock Distant Visitor Guitar:
Complete Career in Expert mode.

Unlock Bat Guitar:
5-Star every song On Easy mode.

Unlock Jolly Roger Guitar:
5-Star every song On Medium mode.

Unlock Tiki Guitar:
5-Star every song On Hard mode.

Unlock El Jefe Guitar:
5-Star every song On Expert mode.

Unlock Nemisis 13 Guitar:
Complete Co-Op Career in any difficulty mode.

Unlock Neversoft Skateboard Guitar:
5-star Co-Op Career in Expert mode.

Unlock Beach Life Bass:
Complete Co-Op Career in Hard mode.

Unock PendulAxe Bass:
Complete Co-Op Career in Expert mode.

To enter the notes go to 'Options' and select 'Cheat' and enter the code to unlock the effect you want. You have to strum as you press the buttons in the code and if two buttons are indicated they must be pressed together as you strum as they represent one cord. ALL the codes except 'Unlock ALL Songs' can be disabled directly from the 'Cheat' menu by pressing the green button.

R = Red, B = Blue, G = Green, Y = Yellow, O = Orange

Unlock Hyperspeed:
Press O, B, O, Y, O, B, O, Y.

Unlock Performance Mode:
Press RY, RB, RO, RB, RY, GB, RY, RB.

Unlock ALL Songs:
Press YO, RB, RO, GB, RY, YO, RY, RB, GY, GY, YB, YB, YO, YO, YB, Y, R, RY, R, Y, O.

Unlock Precision Mode:
Press GR, GR, GR, RY, RY, RB, RB, YB, YO, YO, GR, GR, GR, RY, RY, RB, RB, YB, YO, YO.


Hyperspeed Mode:
There are 5 levels of Hyperspeed with the 'Insanity' level being the most difficult. To switch between the 5 levels enter the code and when it is highlighted press the green button.

Unlock 'Through the Fire and Flames' Track:
Defeat Lou in the final guitar battle on 'Medium' difficulty setting.

At this present moment of time there have been no cheat codes released for Guitar Hero 3: Legends of Rock. What we do know about the PS2 version of the game is that there are over 70 tracks with half of them being the original masters. New features have been introduced like the new multi-player 'Battle' mode and there is unlockable content like authentic Rock venues. You can also buy deluxe wireless peripherals like guitar controllers for the game.


Tracks
Below is a list of the available tracks in the game.

'3's and 7's' - Queens of the Stone Age

'Avalancha' - Héroes del Silencio

'Barracuda' - Heart

'Black Magic Woman' - Fleetwood Mac

'Bulls on Parade' - Rage Against the Machine

'Cherub Rock' - The Smashing Pumpkins

'Cities on Flame with Rock and Roll' - Blue Öyster Cult

'Closer' - Lacuna Coil

'Cult of Personality' - Living Colour

'Even Flow' - Pearl Jam

'Generation Rock' - revolverheld

'Go That Far' - Bret Michaels Band

'Helicopter' - Bloc Party

'Hier Kommt Alex' - Die Toten Hosen

'Hit Me with Your Best Shot' - Pat Benatar

'I'm in the Band' - The Hellacopters

'In the Belly of a Shark' - Gallows

'Knights of Cydonia' - Muse

'La Grange' - ZZ Top

'Lay Down' - Priestess

'Mauvais Garçon' - NAAST

'The Metal' - Tenacious D

'Minus Celsius' - Backyard Babies

'Miss Murder' - AFI

'Mississippi Queen' - Mountain

'My Name Is Jonas' - Weezer

'The Number of the Beast' - Iron Maiden

'One' - Metallica

'Paint It, Black' - The Rolling Stones

'Paranoid' - Black Sabbath

'Radio Song' - Superbus

'Raining Blood' - Slayer

'Reptilia' - The Strokes

'Rock and Roll All Nite' - Kiss

'Rock You Like a Hurricane' - Scorpions

'Ruby' - Kaiser Chiefs

'Sabotage' - Beastie Boys

'School's Out' - Alice Cooper

'She Bangs the Drums' - The Stone Roses

'She Builds Quick Machines' - Velvet Revolver

'Slow Ride' - Foghat

'Suck My Kiss' - Red Hot Chili Peppers

'Take This Life' - In Flames

'Talk Dirty to Me' - Poison

'Through the Fire and Flames' - DragonForce

'Welcome to the Jungle' - Guns N' Roses

'When You Were Young' - The Killers