Complete each Achievement to receive the allotted gamerscore.

Achievement	How to unlock
Peggle PHD ( 20 points )	Complete the Peggle Nights Adventure mode. You'll know everyone at the Peggle Institute!
Purple Necklace ( 10 points )	Hit 13 purple pegs during a single level with Marina in Adventure or Quick Play modes. Pretty!
Tenured ( 20 points )	Complete all of the challenges in Peggle Nights Challenge mode.