Rock Band 3 Cheats

Codes
Enter the following instrument button combination at the Main Menu of the game to unlock

Ovation D-2010 Guitar: Orange, Blue, Orange, Orange, Blue, Blue, Orange, Blue
Unlocks Guild X-79 Guitar in Customization Options: BLUE-ORANGE-ORANGE-BLUE-ORANGE-ORANGE-BLUE-BLUE
Stop! Guitar unlocked: Orange, Orange, Blue, Blue, Orange, Blue, Blue, Orange

Achievements
Accountant's Dozen (15): Beat 12 downloaded songs.
Alex's Luggage Combination (30): Beat a Rock Band 3 score of 12,345,678.
Bass Apprentice (20): 5 Starred on Easy Bass (or 3 Starred on a higher difficulty) 25 Rock Band 3 songs.
Bass Streaker (10): Get a streak of 500 notes on Bass.
Best. Name. Ever. (5): Rename your band.
Bleeding Fingers (30): Get 85% on all Guitar Solos in Rock Band 3 on Hard or Expert.
Complex Chords (25): Complete the "More Chord Holding and Arpeggiation" Pro Guitar lessons.
Dave Grohl Band (30): Beat 5 songs from any band that has had Dave Grohl as a member.
Decent Collection (15): Beat 20 downloaded songs.
Downloader (20): Play a downloaded song.
Drum Roll, Please! (10): Nail a drum roll.
Drum Trainer Graduate (30): Complete the final Pro Drum Trainer lessons.
Drum Trainer Initiate (15): Complete the introductory Pro Drum Trainer lessons.
Drums Apprentice (20): 5 Star on Easy Drums (or 3 Star on a higher difficulty) any 25 Rock Band 3 songs.
Face Melter (25): Melt faces by beating any three '80s Metal songs.
Fastest Feet (15): Hit 90% of the Kick notes in a song on Hard Drums.
Fistful of Awesome (15): Beat 5 downloaded songs.
Guitar Apprentice (20): 5 Star on Easy Guitar (or 3 Star on a higher difficulty) any 25 Rock Band 3 songs.
Guitar Perfectionist (25): Get 100% accuracy on Expert Guitar.
Hell Defrosted (25): Win all rewards on the "Hell Freezes Over" Road Challenge.
Hometown Threwdown (20): Complete the "Hometown Throwdown" Road Challenge.
HOPO-cidal Maniac (25): Kill 53,596 Hammer-ons and Pull-offs.
I Want It All (15): Play a downloaded Queen song.
Is This Just Fantasy? (25): Hit all triple awesomes in "Bohemian Rhapsody" on Medium or a higher difficulty.
Just Another Band Out of Boston (15): 5 Star any Boston song.
Keys Apprentice (20): 5 Star on Easy Keys (or 3 Star on a higher difficulty) any 25 Rock Band 3 songs.
Keys Streaker (15): Get a streak of 350 notes on Keys.
Live Free or Die (25): Beat all of the free downloadable songs for Rock Band.
Major Mileage (25): Get 90 or more spades on "The Long Drive South" Road Challenge.
Mercurial Vocalist (30): Earn 5 stars on Vocals on a downloaded Queen song.
Mile High Club (25): Complete the "Really Frequent Flyers" Road Challenge.
Millionaire Club (25): Get 1,000,000 on one song.
Most Authentic Strummer (10): Hit 100% of the notes, only strumming up, on Hard Bass.
Party Animal (20): Completed the "Total Debauchery" Road Challenge.
Play a Real Guitar Already! (15): Play "The Hardest Button to Button" on Pro Guitar.
Power Chords (15): Complete the "Power Chords" lessons in the Pro Guitar trainer.
Pro Bass Apprentice (20): 5 Star on Easy Pro Bass (or 3 Star on a higher difficulty) any 25 Rock Band 3 songs.
Pro Guitar Apprentice (20): 5 Star on Easy Pro Guitar (or 3 Star on a higher difficulty) any 25 Rock Band 3 songs.
Pro Guitar to the Max (15): Max out your Score Multiplier meter on Pro Guitar.
Pro Keyboardist (15): Hit at least 90% of the notes in 3 songs on Expert Pro Keys.
Pro Keys Apprentice (20): 5 Star on Easy Pro Keys (or 3 Star on a higher difficulty) any 25 Rock Band 3 songs.
Pro Keys Graduate (25): Complete the final Pro Keys trainers.
Pro Keys to the Max (15): Max out your Score Multiplier meter on Pro Keys.
Real Nor'easter (20): Complete "The Wicked Awesome Tour".
Rock Band Immortal (50): 5 Star every song in Rock Band 3 on Expert.
Rock Band Legend (30): 5 Star every song in Rock Band 3 on Hard.
Rock Band Master (25): 5 Star on Medium (or 3 Star on a higher difficulty) any 50 Rock Band 3 songs.
Self-Made Dude or Lady (5): Create a Character.
Shameless Self-Promotion (15): Download and play three songs from a band that has Harmonix team members in it.
Tambourine Master (10): Hit 100% of the notes in a percussion section.
The Connoisseur's Connoisseur (25): Get 90 or more spades on "The European Connoisseur" Road Challenge.
The Endless Setlist III (50): Sucessfully complete "The Endless Setlist III!"
The Perfect Drug (30): Get a 200 note streak on "The Perfect Drug".
Triple Awesome (10): Get a Triple Awesome while playing with Vocal Harmonies.
Tune Up (4): Calibrate your audio/video setup for the optimal Rock Band 3 experience.
Ultimate Road Warrior (30): Win all awards on the "Really Frequent Flyers" Road Challenge.
Vocal Apprentice (20): 5 Star on Easy Vocals (or 3 Star on a higher difficulty) any 25 Rock Band 3 songs.
Vocal Virtuoso (15): Earn an Awesome rating on at least 90% of the phrases in 6 songs on Hard Vocals.
Vocals Showmanship (10): Deploy overdrive four times in a single song as a vocalist.
Well Connected (6): Connect your Rock Band 3 Band with rockband.com at http://www.rockband.com.
Wilderness Survival (20): Complete the "Through the Wilderness, Eh?" Road Challenge.
You Ain't Seen Nothing Yet (20): Maintain overdrive for 60 seconds.