Guitar Hero 2 - Master code

In the PAL version, press Blue, Yellow, Orange, Red, Orange, Yellow, Blue, Yellow, Blue, Yellow, Blue, Yellow, Blue, Yellow, Blue, Yellow at the main menu.

All songs:
Press Blue, Yellow, Orange, Red, Orange, Yellow, Red,Yellow, Red, Yellow, Red, Yellow, Red, Yellow, Red, Yellow at the main menu.

In the PAL version, press Blue, Yellow, Orange, Red, Orange, Yellow, Blue, Yellow, Blue,Yellow, Blue, Yellow, Blue, Yellow, Blue, Yellow.

Hyper speed mode:
Press Blue, Orange, Yellow, Orange, Blue, Orange, Yellow2 at the main menu. The frets will be moving faster. You can still save your game when this code is enabled. Repeat this code to disable its effect.

Performance mode:
Press Blue2, Yellow, Blue2, Orange, Blue2 at the main menu. Everything disappears except for the performance.

Air guitar mode:
Press Yellow, Blue, Yellow, Orange, Yellow, Blue at the main menu.

Achievements:
Complete the following achievements to unlock Xbox Live Gamerscore points.

100K Club 10 points: Get 100,000 points in a song.

200K Club 10 points: Get 200,000 points in a song.

300K Club 30 points: Get 300,000 points in a song.

400K Club 30 points: Get 400,000 points in a song.

Champagne Room V.I.P. 30 points: Get 500,000 points in a song.

Roadie 10 points: Unlock Rat Cellar.

New Kid 10 points: Unlock Blackout Bar.

Young Gun 10 points: Unlock RedOctane Club.

Axe Grinder 10 points: Unlock Rock City Theater.

Shredder 10 points: Unlock Vans Warped Tour.

Rock Star 10 points: Unlock Harmonix Arena.

Guitar Hero 10 points: Unlock Stonehenge.

Dimebag Darrell Award 10 points: Get a 100 note streak.

Eddie Van Halen Award 30 points: Get a 500 note streak.

Yngwie Malmsteen Award 30 points: Get a 1000 note streak.

Easy Tour Champ 10 points: Beat the Easy tour.

Medium Tour Champ 30 points: Beat the Medium tour.

Hard Tour Champ 30 points: Beat the Hard tour.

Expert Tour Champ 30 points: Beat the Expert tour.

Sandbox Hero Award 30 points: Earn five stars on all songs in the Easy tour.

Most Likely to Succeed Award 30 points: Earn five stars on all songs in the Medium tour.

Guitarmaggedon Award 30 points: Earn five stars on all songs in the Hard tour.

Start a Real Band Already Award 30 points: Earn five stars on all songs in the Expert tour.

Rock School Grad 10 points: Complete all tutorials.

Scoremonger Award 10 points: Get an 8x multiplier.

Perfectionist Award 30 points: Get 100 notes hit on a song.

Rock Snob Award 10 points: Refuse to play an encore.

Long Road Ahead Award 10 points: Fail a song on Easy.

Hendrix Award 10 points: Beat a song with lefty flip on.

Teacher's Pet Award 10 points: Practice three different songs.

Saturday Morning Award 10 points: Beat Trogdor and Thunder Horse.

Kick the Bucket Award 30 points: Beat Jordan on Expert.

Gear Head Award 30 points: Buy all guitars.

Fanatical Completionist Award 30 points: Buy all guitar finishes.

Record Collector Award 10 points: Buy all songs.

Life of the Party Award 10 points: Buy all characters.

Fashion Plate Award 10 points: Buy all outfits.

Extra Credit Award 10 points: View the credits.

Big Spender Award 10 points: Spend 10,000 at the store.

Scenester Award 10 points: Beat all the unlock songs.

Joan & Lita Award 30 points: Get a 100 note streak in Cooperative.

Joe & Steven Award 30 points: Get a 500 note streak in Cooperative.

Keef & Mick Award 30 points: Get a 1000 note streak in Cooperative.

Lennon & McCartney Award 10 points: Get an 8x streak in Cooperative.

Page & Plant Award 30 points: Get 100 notes hit on a song in Cooperative.

200K Pair 30 points: Get 200,000 points on a song in Cooperative.

400K Pair 30 points: Get 400,000 points on a song in Cooperative.

600K Pair 30 points: Get 600,000 points on a song in Cooperative.

800K Pair 30 points: Get 800,000 points on a song in Cooperative.

Millionaire Pair 30 points: Get 1,000,000 points on a song in Cooperative.

Pro-Face Off mode:
Successfully complete the Career mode under the medium difficulty setting. You can now play against your friends with same notes.

Bonus guitars:
Complete the indicated task to unlock the corresponding guitar at the shop.

Snaketapus: Complete Hard mode.
The Log: Get a five star rank on all songs in Expert mode.
Battle Axe: Complete Expert mode.
Casket: Complete Medium mode.
Eyeball: Get a five star rank on all songs in Hard mode.
Fish: Complete Easy mode.
U.S.A.: Get a five star rank on all songs in Easy mode.
Viking: Get a five star rank on all songs in Medium mode.

Bonus basses:
Complete the indicated task to unlock the corresponding bass at the shop for Co-op mode.

Gibson Cherry SG: Complete 10 songs in Co-op mode.
Gibson Cream SG: Get a five star rank on 20 songs in Co-op mode.
Gibson Grabber: Complete 20 songs in Co-op mode.
Gibson Natural Maple Grabber: Get a four star rank on all songs in Co-Op mode.
Gibson Natural Sunburst Thunderbird: Get a five star rank on all songs in Co-Op mode.
Gibson Natural Thunderbird: Get a five star rank on all of the regular songs in Co-op mode.
Gibson Thunderbird: Complete 30 Songs in Co-op mode.
Hofner: Complete all Co-Op mode songs.
Musicman Lava Pearl Stingray: Get a five star rank on 10 songs in Co-Op mode.

Bonus songs:
Note: You must do the following under the medium or higher difficulty setting.

Tonight, I'm Gonna Rock You Tonight: Complete the first set and do the encore.

Carry On My Wayward Son: Complete the second set and do the encore.

War Pigs: Complete the third 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.

Golden four star:
Hit every note in a song but strum an extra time whenever you get a 4x multiplier.