Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Expanding Horizons (15 points): Unlock second career Disc.
Great Things Ahead (20 points): Unlock third career Disc.
Debut Album (10 points): Complete every gig on first disc.
Special Edition (15 points): Complete every gig on second disc.
Greatest Hits (20 points): Complete every gig on third disc.
World Tour (30 points): Complete all three discs.
Big Noise at Home (10 points): Earned the Career rating (Lounge Act).
Star Quality (15 points): Earn the Career rating (National Celebrity).
Lifetime Achievement (50 points): Earn the Career rating (Legend).
Face the Music (30 points): Pass a High Risk gig without ever entering Boot state on Expert Full song.
Host with the most (5 points): Sing your first song in Party Mode.
Co-operative Commune (5 points): Complete a Party list with all players on a single team.
Nothing but a good time (5 points): Complete a Party list with 4+ players.
Minor Sensation (20 points): Earn 100 "Sensational" Score Prizes.
Complete Sensation (30 points): Earn 200 "Sensational" Score Prizes.
Area 51 (10 points): Unlock the Area 51 Venue items and perform in front of them.
Big Streaker (20 points): Sing a 10 phrase "Excellent" streak.
Lightning (40 points): Sing a 10 phrase "Excellent" streak on Expert.
Bigtime Booster (30 points): Earn 6x Multiplier from a single Star Boost.
Multiplier Mayhem (20 points): Achieve a 20x multiplier.
A New Voice (5 points): Perform as a new character created from scratch.
Multiplier Madness (30 points): Earn a 30x multiplier.
Galaxy Class (30 points): Activate Star Boost 4 times in a single song.
Stage Designer (5 points): Perform in a venue created from scratch.
Phenomenal (20 points): Earn the Career rating (Phenomenal).
Didn't They Duet Well? (20 points): Get a Sensational score rating on a Duet.
Challengers (10 points): Play ten Head-to-Head rounds.
BRAINS! (10 points): Create and sing in a venue with a Zombie center piece and backdrop.
Rapid Fire (10 points): Perform ten Medleys.
Eclectic Dreams (40 points): Perform a 5 song Medley of all different genres and score a Platinum rating.
Vocal Stamina (10 points): Perform a 5 song Set for the first time.
Identity Crisis (10 points): Perform a 5 song set of all different genres.
Live and Screaming (50 points): Score at least 5 million points in a single Set.
Mics At Fifteen Paces (10 points): Play a Head-to-Head match online.
Musical Espionage (10 points): Perform in a venue created by another online player - check your Venue Presets.
World, Shut Your Mouth (10 points): Play a Tournament Online.
Spartan (20 points): Completed 300 performances.
Star Booster (30 points): Activate Star Boost 100 times.
Seven Figure Superstar (10 points): Score over a million points on a single song.
Halfway to Paradise (30 points): Get 50 million points cumulative across all game modes.
The Road is Long (40 points): Get 100 million points cumulative across all game modes.
Double Album (15 points): Earn 45 "Platinum" Skill Prizes.
Hall of Fame (30 points): Earn 90 "Platinum" Skill Prizes.
Record Collector (15 points): Sing every song on the disc at least once.
Platinum (10 points): Finish a song with over 90% accuracy.
Perfection (40 points): Finish a song with 100% accuracy.
Hard Carbon (50 points): Earn a Perfect rating on Expert.
Ground Control (10 points): Perform Space Oddity in Space.
The Platinum 5 (10 points): Earn a Platinum skill rating for a 5 song Jackson medley.
Out of the Flames! (10 points): Unlock every venue item in Career Mode.