World Idol
Win the full American Idol tournament at Expert difficulty level
80 ✓ August 2nd, 2008
American Idol
Win the full American Idol tournament at any difficulty level
50 ✓ March 21st, 2008
Hero
Achieve Diamond Status for ten different songs
50 ✓ March 27th, 2008
Million Seller
Achieve Platinum Status for every song on the disc
50 ✓ March 23rd, 2008
Superstar
Achieve Diamond Status for five different songs
25 ✓ March 22nd, 2008
The Showman
Complete a medley and receive Platinum Status
20 ✓ March 20th, 2008
The Great American Songbook
Sing all the songs on the disc once - full song only
20 ✓ March 23rd, 2008
It Sounds Like a Lot
Score 1 million points (cumulative in any mode)
20 ✓ March 20th, 2008
Why Don't You Marry Him Then
Achieve "Excellent" comments from Simon three times in a row during an American Idol tournament
15 ✓ March 20th, 2008
Headbanger
Compete offline in a battle Head to Head game
10 ✓ March 20th, 2008
Premiership
Compete offline in an Arcade League game
10 ✓ March 20th, 2008
Just the Two of Us
Play an offline Co-op Duet
10 ✓ March 20th, 2008
Megastar
Achieve Diamond Status for one song
10 ✓ March 20th, 2008
Inspiration
Achieve Gold Status for every song on the disc
10 ✓ March 23rd, 2008
Golden Ticket
Pass the auditions phase in single player
10 ✓ March 20th, 2008
The First of Many
Achieve Platinum Status for one performance
5 ✓ March 20th, 2008
Maestro
Achieve Diamond Status for every song on the disc
175 
Dedication
Score 50 million points (cumulative in any mode)
100 
Girl’s Best Friend
Get a perfect score throughout a full American Idol tournament
100 
Legend
Achieve Diamond Status for twenty different songs
75 
It Didn't Take That Long
Score 10 million points (cumulative in any mode)
50 
American Sensation
Win 20 American Idol single player tournaments
30 
Ranked Grudge Match Winner
Win an Xbox LIVE Head-to-Head ranked match
15 
Ranked World Tour Winner
Win an Xbox LIVE American Idol Tournament ranked match
15 
Ranked Global Star Winner
Win an Xbox LIVE Arcade League ranked match
15 
Grudge Match
Play an Xbox LIVE Head-to-Head match
10 
World Tour
Play an Xbox LIVE American Idol Tournament match
10 
Global Star
Play an Xbox LIVE Arcade League match
10