Rock Band Cheats

Unlock All Songs
At the "Rock Band" title screen press START button (it is at the bottom of the screen):

[Red], [Yellow], [Blue], [Red], [Red], [Blue], [Blue], [Red], [Yellow], [Blue]: Unlock All Songs (disables saving)

Achievements
Complete each of the following achievements below to get the allotted gamerscore.

AN-I-MAL!!! (50): Finish Drum Solo Tour on Expert
Axe Assassin (40): Finish Guitar Solo Tour on Hard
Big In Amsterdam (10): Finish the last remaining gig in Amsterdam (Band World Tour)
Big In Berlin (10): Finish the last remaining gig in Berlin (Band World Tour)
Big In Boston (10): Finish the last remaining gig in Boston (Band World Tour)
Big In Chicago (10): Finish the last remaining gig in Chicago (Band World Tour)
Big In Japan (10): Finish the last remaining gig in Tokyo (Band World Tour)
Big In LA (10): Finish the last remaining gig in Los Angeles (Band World Tour)
Big In London (10): Finish the last remaining gig in London (Band World Tour)
Big In Moscow (10): Finish the last remaining gig in Moscow (Band World Tour)
Big In NYC (10): Finish the last remaining gig in New York (Band World Tour)
Big In Paris (10): Finish the last remaining gig in Paris (Band World Tour)
Big In Reykjavik (10): Finish the last remaining gig in Reykjavik (Band World Tour)
Big In Rio de Janeiro (10): Finish the last remaining gig in Rio de Janeiro (Band World Tour)
Big In Rome (10): Finish the last remaining gig in Rome (Band World Tour)
Big In San Francisco (10): Finish the last remaining gig in San Francisco (Band World Tour)
Big In Seattle (10): Finish the last remaining gig in Seattle (Band World Tour)
Big In Stockholm (10): Finish the last remaining gig in Stockholm (Band World Tour)
Big In Sydney (10): Finish the last remaining gig in Sydney (Band World Tour)
Breakthrough Act (10): Unlock a Big Club in Solo Tour on Easy, Medium, Hard or Expert
Crooner (40): Finish Vocal Solo Tour on Hard
Flawless Drumming (10): Score 100% notes hit as a drummer on Expert
Flawless Fretwork (10): Score 100% notes hit as a guitarist on Expert
Flawless Groove (10): Score 100% notes hit as bassist, up-strums only, on Expert
Flawless Singing (10): Score a 100% rating as a vocalist on Expert
Fret Ripper (30): Finish Guitar Solo Tour on Medium
Gold Artist (20): Finish the Endless Setlist in Band World Tour on Hard
Got Wheels (20): Unlock the Van in Band World Tour
Groove Technician (30): Finish Drum Solo Tour on Medium
Hall of Fame Inductee (100): Finish the Hall of Fame Induction in Band World Tour
Heavy Hitter (40): Finish Drum Solo Tour on Hard
Hot Artist (10): Unlock a Theater in Solo Tour on Easy, Medium, Hard or Expert
Howler (20): Finish Vocal Solo Tour on Easy
Jet Setter (20): Unlock the Jet in Band World Tour
Killer Performance (10): Five Star a song on Easy, Medium, Hard or Expert
Lord of the Strings (50): Finish Guitar Solo Tour on Expert
One Million Fans (10): Reach 1 million fans in Band World Tour
Open Road (20): Unlock the Bus in Band World Tour
Platinum Artist (25): Finish the Endless Setlist in Band World Tour on Expert
Rhythm Rocker (20): Finish Drum Solo Tour on Easy
Riding on Coattails (5): Play with a "Platinum Artist"
Score Duel Champ (30): Win 20 Score Duel ranked matches
Score Duel Streak (20): Win 5 Score Duel ranked matches in a row
Screamer (30): Finish Vocal Solo Tour on Medium
String Shredder (20): Finish Guitar Solo Tour on Easy
Top Artist (10): Unlock an Arena in Solo Tour on Medium, Hard or Expert
Tug of War Champ (30): Win 20 Tug of War ranked matches
Tug of War Streak (20): Win 5 Tug of War ranked matches in a row
Vinyl Artist (10): Finish the Endless Setlist in Band World Tour on Medium
Virtuoso (50): Finish Vocal Solo Tour on Expert