At the main menu press these buttons in quickly: Yellow, Yellow, Blue, Orange, Yellow, Blue.
Co-Op Guitars
Here is how you can unlock additional Basses 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
Crowd Meter
This code will unlock the rock meter cheat. It will allow you to miss notes but the rock meter will stay at full green. At the main menu press: Yellow, Blue, Orange, Orange, Blue, Blue, Yellow, Orange.
Do not fear the reap, er, rock star?
Ever wanted to play with that sweet scythe but not with Grim? Well now you can! once you have bought the Grim Ripper from the store, go to the Career level you want to play with the scyte on and pick the character you will play as. Next, go to any other difficulty and choose Grim. Make sure he has his scythe and then go back to the other difficulty. your character will be listed as playing the Scythe! And you will!
Eyeball Head Crowd
At the main menu press in these buttons quickly: Blue, Orange, Yellow, Orange, Yellow, Orange, Blue. This will make everyone's head in the audience turn into a eyeball.
Face-off Mode
Complete the game on medium or higher.
Flaming Fingers
On ANY character, to make your fingers catch on fire get a X4 multiplier on any guitar chorus. Once you do this you fingers will catch on fire when you play.
Flaming Head
At the main menu press in these buttons quickly: Orange, Yellow, Orange, Orange, Yellow, Orange, Yellow, Yellow. This cheat will give your character a head that is on fire.
Grims got a Gibson!
To play with the Grim Ripper but without his guitar, it's pretty simple. all you need is to have bought him, have 2 difficulty levels playable, and the guitar you want to play with. Select any difficulty except the one you want to play on. choose any character and go to the change Guitar screen. select the guitar you want to rock out with, tehn go back to the difficulty page. select the level you will play on, and it will say "Now Showing, The Grim Ripper playing the _____" or something like that. Rock On!
Horse Head
At the main menu press in these buttons quickly: Blue, Orange, Orange, Blue, Orange, Orange, Blue, Orange, Orange, Blue. This will give your character a horse head.
Hyper Speed Mode
At the main menu press in these buttons quickly: Orange, Blue, Orange, Yellow, Orange, Blue, Orange, Yellow.
Make Grim Ripper play Gibson Les Paul
After unlocking the Grim Ripper, select him as your guitarist in Career mode, then exit Career mode. Next, go to Quick Play mode, choose any song at any difficulty, and either finish the song, or quit once it has started. Then, 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.
Master code (unlock all)
This is the code that unlocks everything. Guitars, songs, videos, EVERYTHING. However, SAVING IS DISABLED when the code is inputted and you must turn off your ps2 to turn off the effect.
Press it in at the MAIN MENU screen in a quickly manner.
Monkey Head Crowd
At the main menu press these buttons in quickly: Orange, Blue, Yellow, Yellow, Orange, Blue, Yellow, Yellow. This will turn everyone's head in the audience to Monkey Heads.
Performance Mode
At the main menu press these buttons quickly: Yellow, Yellow, Blue, Yellow, Yellow, Orange, Yellow, Yellow.
Play The Scythe With (Almost) Anyone
First you must have Grim Ripper unlocked and select him. Then select another character. The character MUST have their other outfit unlocked. They will have the Scythe unless you change the guitar. Note: Since Clive Winston and Xavier Stone do not have an unlockable outfit, they can't play the Scythe.
Rock meter always in green
At the main menu press Yellow, Blue, Orange, Orange, Blue, Blue, Yellow, Orange.