Highlight the following options in the main menu in order to play the notes to Beethoven's "Ode To Joy": "Duel" two times, "Challenge", "Replay" two times, "Challenge", "Duel", "Quickplay", "Adventure" two times, "Quickplay", "Duel" two times, "Quickplay" two times. You will unlock a trophy featuring Beethoven's face.

ACHIEVEMENT - HOW TO UNLOCK
Ace of Aces - Gain ace score in every level and achieve explodious fame!
Be Cool - Hit the last orange peg and then hit the final blue peg to rack up a Cool Clear style shot AND Ultra Extreme Fever. (Except Duel).
Boomer! - All clear every level on the Left 4 Dead Bonus Pack.
Catch the Fever! - Cure your need for fever with an Extreme Fever. (Except Duel).
Clear Conscience - Achieve the ultimate envy of your peers! Get the all clear blue ribbon on every level!
Electrification! - Achieve the Shock It To Me style shot twice in one level by clearing a dozen or more pegs with lightning.
Free! Free! Free Ball! - Rack up the score or hit the bucket for 3 free balls in one shot.
Go ULTRA! - Clear all the pegs in a level. It's pretty extreme, but you look like you can handle it. (Except Duel).
Peggle Graduate - Complete Adventure Mode and earn your degree from the Peggle Institute.
Peggle Professor - Go above and beyond your fellow Peggle Graduates by scoring 20 million points in Adventure Mode.
Rise to the Challenge - Complete every level in Challenge Mode and even the Peggle Masters will be impressed.
Stylish Project - Earn 1 million lifetime style shots points! Now's the time to bust out your Free Ball Skills, Mad Skillz, Crazy mad Skillz, Lucky Bounces and Extreme.
Too Cool For School - Defeat any Peggle Master in Duel Mode on Master difficulty.
Zombolicious - Complete every challenge in the Left 4 Dead Bonus Pack.