Bonus Guitars
Complete the listed task to unlock the listed guitar at the shop:

Battle Axe	Win the game on the Expert difficulty setting.
Casket	Win the game on the Medium difficulty setting.
Fish	Win the game on the Easy difficulty setting.
Eyeball	Get a five star rank on all songs on the Hard difficulty setting.
Snaketapus	Win the game on the Hard difficulty setting.
The Log	Get a five star rank on all songs on the Expert difficulty setting.
U.S.A.	Get a five star rank on all songs on the Easy difficulty setting.
Viking	Get a five star rank on all songs on the Medium difficulty setting.

Ranks

One star	Get 64% or less of the notes correct.
Two stars	Get 65% to 76% of the notes correct.
Three stars	Get 76% to 88% of the notes correct.
Four stars	Get 88% to 96% of the notes correct.
Five stars	Get at least 96% of the notes correct.
Gold five stars	Get every note correct on a song.

Eyeball Headed Audience
From MAIN MENU, quickly press:
Blue, Orange, Yellow, Orange, Yellow, Orange, Blue
If you entered correctly, a message will appear. Repeat this code to disable its effect.
PAL version: Yellow, Orange, Blue, Orange, Blue, Orange, Yellow from main menu.

Bonus basses
Description: Complete stated number of songs in Co-Op mode to unlock the listed bass at the shop for Co-Op mode:

Gibson Grabber	20 songs
Gibson SG	10 songs
Gibson Thunderbird	30 songs
Lava Pear Musician Stingray	21 songs with a five star rank on the Hard difficulty setting

Flaming Head
From MAIN MENU, quickly press:
Orange, Yellow, Orange(2), Yellow, Orange, Yellow(2)
A message will appear if you entered correctly. Repeat this code to disable its effect. PAL version, quickly press Yellow(2), Orange, Yellow, Orange(2), Yellow, Orange from main menu.

Co-Op Guitars Unlocks
Unlockable Basses list in Co-Op mode:

Gibson SG Bass	Beat 10 Songs
Gibson Grabber	Beat 20 Songs
Gibson Thunderbird	Beat 30 Songs
Gibson Les Paul and skin	Beat 40 Songs
Hofner Bass	Beat every song
Lava Pearl Musicman Stingray	Get 5 stars on at least 10 songs
Cream SG	Get 5 stars on 20 songs
Natural Sunburst Gibson Thunderbird Bass	Get 5 stars on every co-op mode song (stacks with below)
Natural Maple Gibson Grabber Bass	Get 4 stars on all co-op mode songs

Green Button trick
Just put a rubber band around the green button,play it on hard so you do not have to push 5 buttons at a time. Try it!

Scorpion
Ok you go to the MAIN MENU and hit this code.
Yellow,blue,blue,red,orange,blue,Yellow,green,green,orange,red,red,red

Then you count 8 beats on any song under easy and on the 8th beat pause the game and press the orange, yellow and red button at the same time.

Then finish the song with 95% more and you will unlock Scorpion from MortalKombat as your character!!!

Performance mode
Description: From MAIN MENU, quickly press:
Yellow(2), Blue, Yellow(2), Orange, Yellow(2)
A message will appear if you entered correctly. In this mode, everything except for the performance,disappears. You can repeat this code to disable its effect.
PAL version, quickly press:
Yellow(2), Orange, Yellow(2), Blue, Yellow(2) from main menu.

Hyper Speed mode
From MAIN MENU, quickly press:
Orange, Blue, Orange, Yellow, Orange, Blue, Orange, Yellow
A message will appear if you entered correctly. In this mode, the frets will move faster. You can repeat this code to disable its effect.
PAL version, quickly press:
Yellow, Orange, Blue, Orange, Yellow, Orange, Blue, Orange from main menu.

Horse head
From MAIN MENU, quickly press:
Blue, Orange(2), Blue, Orange(2), Blue, Orange(2), Blue
If you entered correctly, a message will appear. Repeat this code to disable its effect.
PAL version, quickly press:
Orange(2), Blue, Orange(2), Blue, Orange(2), Blue, Orange at the main menu.

Playing the Scythe with others
How to unlock: Unlock the Grim Ripper and select him.
Select another character whose alternate costume/outfit is already unlocked and they will have the Scythe. ***Clive Winston and Xavier Stone do not have an unlockable costumes/outfits and cannot do this trick.

PAL version Cheat mode
Unlock all bonuses:
From MAIN MENU, quickly press:
Blue, Yellow, Orange(2), Yellow, Blue, Yellow, Blue, Yellow, Blue, Yellow, Blue, Yellow, Blue, Yellow .

Guitarist uses Air Guitar
From MAIN MENU, quickly press:
Yellow(2), Blue, Orange, Yellow, Blue
If you entered correctly, a message will appear. Repeat this code to disable its effect. PAL version, quickly press: Blue, Yellow, Orange, Blue, Yellow(2) from main menu.

Pro Face-Off mode
This mode allows 2 players to play all the notes. to do it you must win the game on the Medium difficulty setting to unlock Pro Face-Off mode.

Grim Ripper plays Gibson Les Paul
How to unlock: Unlock the Grim Ripper.
Select Grim Ripper as your guitarist in Career mode, then exit Career mode.
Go to Quick Play mode, choose any song on any difficulty level. You can either finish the song or quit once it has started.
Now, go back to Career mode and the Grim Ripper will be playing the Gibson Les Paul with the Cherry Sunburst Classic skin. To make him play the Scythe again, simply select it in the Change Guitar menu.

Monkey Headed Audience
From the MAIN MENU, press:
Orange, Blue, Yellow(2), Orange, Blue, Yellow(2)
If you entered correctly, a message will appear. Repeat this code to disable its effect.
PAL version, quickly press:
Yellow(2), Blue, Orange, Yellow(2), Blue, Orange from main menu.

Bonus Song List
Description: Complete the listed task on the Medium or higher difficulty setting to unlock the listed song:

Tonight, I'm Gonna Rock You Tonight	Complete the 1st set and do the encore.
Carry On My Wayward Son	Complete the 2nd set and do the encore.
War Pigs	Complete the 3rd set and do the encore.
Sweet Child O' Mine	Complete the fourth set and do the encore.
Last Child	Complete the fifth set and do the encore.
Stop	Complete the sixth set and do the encore.
YYZ	Complete the seventh set and do the encore.
Free Bird	Complete the eighth set and do the encore.

Full Rock meter
You can now start a song and max out the Rock meter, then reset the song to start with a full rock meter.

HYPER SPEED
Hyper speed is easy so here what it does it might go fast a litttle bit but it makes lesser notes in that song it is going fast thats why.Just press blue,orange,yellow,orange,blue,orange,yellow,yellow.Do that fast and hyper speed should work if it did not try a few more times you will get and hyper speed will work good luck doing that cheat.

Guitar Hero 2 Cheat Code Hints!!!
Master Unlock code is blue yellow orange red orange yellow red yellow red yellow red yellow red yellow red yellow enter this code at the start menu if entered correctly you will hear a guitar rif and it will say unlocked! You have to enter this code fast for it to work, if you do not enter it fast enough it will not work! It unlocks everything but disables auto save, so you will have to enter it everytime you reset.

Having a hard time getting from medium to hard? Go into practice mode and play different songs on hard, instead of placing your fingers on the 1st 4 frets place them on the 2nd through 5th. You will have to learn which fingers play which keys when you slide down to hit the orange fret. Ignore the green fret while you learn these keys, Before you know it you will retrain your fingers to play these keys! Then you will have no problem going back to the 1st 4 and easily sliding down and playing the 2nd hand position to hit those orange keys! I thought hard was impossible until I learned the 2nd hand position and within a week I am on expert! Good luck!

Grim reaper with Gibson Les paul
Play as Izzy sparks with the Gibson les paul (Standard Les paul) begin a song, quit, then go back to the character selection menu, and as the Grim reaper and start a song and he'll have the Gibson Les Paul

Hyper speed
At the main page of guitar hero 2, press the following buttons-

orange, blue, orange, yellow, orange, blue, orange, yellow,

do not strum it, just tap the buttons.

if you strum it wont work

Help on Hard
If you are having trouble with a song on hard, go to the main menu. Type in this code:
Orange blue orange yellow orange blue orange yellow
This is the Hyperspeed cheat. Then play that song on expert 2-5 times. Then enter the cheat again and play it on hard. It will seem much easier.
Also works for easy and medium (or expert but you just do hyperspeed).

Amps on fire
The code is y o(2) b y r y r(3)

John lennon
Press y y r b b b o r
and you will get john lennon

Guitar on fire
The code is o(4) r b y(4) o

No frontman
O O B R Y Y O R

Hyperspeed & Monkey Head Crowd
OBOYOBOY OBYYOBYY

UNLOCK ALL(DUALSHOCK2)
X,TRIANGLE,SQUARE,CIRCLE,SQUARE,TRIANGLE,CIRCLE,TRIANGLE,CIRCLE

Playing Clock
At the main menu press red (4), yellow, blue (2), yellow, blue, yellow, blue (5).
A sound will confirm you did it correctly. Start a new career and it will say your total song playing time for that career. This code can be de-activated.

Awesome Glitch
Ok go to practice mode. pick any song. click on the first available section of the song and only play it. you pick any difficulty. you dont have to hit all the notes but at the end of the section unplug your guitar just before the percentige screen comes up. plug it back in if the screen keeps rolling then thats good. if you pulled out the plug out to early you can pull it out again. now thats done go to career and go to any difficulty and click on any song available. it will look just like practice mode. when the song starts you will be playing the intro to the song you were playing in practice mode. hit all the notes and the game will play the rest! dont press any buttons or strum or it wont work. at the end of the song (only if you hit all the notes) you will get 100% on that song. you can repeat without going back to practice mode. just play your next song on the list. and another thing this works on the song Jordan so you can tell your friends that you got 100% on the hardest song on the game!

Gary chester v.a
Hyper speed 1.5X b,y,o,r,b,y,or

Use Star Power Wisely
This isn't much of a hint unless you're having EXTREME difficulties on a song and the only thing that can save you is Star Power.
Basically, activate Star Power when the hard part comes up, or when lots of notes come. You'll be going from glowing red to green in no time!
Also memorize where certain points in the song. Besides notes, long notes, cords, Hammer-ons and Pull-offs, you also need to memorize where you gain Star Power. DO NOT ACTIVATE STAR POWER IN THESE POINTS OF THE SONG! You cannot gain Star Power if it's already activated. Same story if you activate Star Power while you're gaining it. I tested, and it doesn't work. Activating it at the end of the series, and on a long note, however, is okay, but you ahould be hitting the wammy instead of tilting the guitar.
Another thing: Unless a long note is glowing, has a star at the begginning AND it is long enough for you, DO NOT USE THE WAMMY! Waist of time, and takes your hand away from the strum bar if you need it in a few seconds. The best way to position the wanny is to position it just below the strum bar, BUT NOT TOO CLOSE, or you'll accidentally strum, and loose both the rest of the note, and the Star Power.

Reply to Air guitar/performance mode cheats
Sorry for saying it was bogus. I guess my version is slightly different so I will try the PAL versions to see if they work.

The others made my guitar, score/rock meter, and the thingy were you see all of the frets, dissapear so I couldn't see what I had to hit at all or when the song began.

GuitarHero 2
Tap orange blue orange yellow fassssssst 2 times (HYPER SPEED)julia perales

Cheat guitar heo 2 using dualshock!!!!
At the main menu press x,triangle,square,circle,square,(triangle,circle 2x)

Full Rock Meter into bonus.
When you play a song on medium you will go to a bonus song and you will have full star power, so don't use your star power at the end of a song.

Cheat for dualshack controller
Must end all with continuous triangle

monkey audience
-square,x,triangle(2),square,x,triangle(2)

eyeball head
-x,square,triangle,square,triangle,square,x

flaming head
-square,triangle,square(2),triangle,square,triangle(2)

air guitar
-x,triangle(2),x,square,triangle,x,square,triangle

hyper speed
-x,square,triangle,square,triangle,square,x,square,triangle

Unlock every thing
Red, blue, blue, orange, yellow, yellow, orange