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

Ride the Groove (20 points): 5-Star "Ride" as a Bassist on Hard or harder.
Awful Beautiful Career (35 points): Complete Solo Tour on any difficulty.
International Heartachers (35 points): Complete Band Tour on any difficulty.
Wild Desire (20 points): 5-star "Ring of Fire" as a Vocalist on Hard or harder.
Country Boy Drum Roll (20 points): 5-Star "That's How Country Boys Roll" as a Drummer on Hard or harder.
It's Been A While (20 points): 5-Star "Kiss a Girl" as a Guitarist on Hard or harder.
The One You Lean On (10 points): Hit all unison bonuses in any song with Guitar, Bass, and Drums.
Neon Dreams (10 points): Maintain deployed Overdrive for 90 seconds.
Worked All Week (10 points): Score 100% notes hit with any instrument in "Sideways" ... on the weekend.
Ain't Settlin' (20 points): Earn 80 stars across all songs in Solo or Band Tour.
Perfect Play (40 points): Earn a gold star on any song.
Giddy On Up (10 points): Earn more than 1,000,000 points in a single song.