Complete each achievement to get the allotted gamerscore.

Achievement	How to unlock
10 Idols (100)	Produce all 10 girls.
100 Auditions (100)	Win 100 auditions.
100 Communications (100)	Get 100 "Good" or "Perfect" Communications.
100 Lessons (100)	Get 100 "Good" or "Perfect" Lessons.
100 Memories (100)	Gain 100 Memories when communicating with your idol(s).
16 Songs (100)	Produce all 16 songs.
4 Seasons (100)	Win the special auditions for Spring, Summer, Fall, and Winter, and
Best Ending (100)	Get an A rank and succeed at the Farewell Concert at the Dome.
Super Idol (100)	Win the Super Idol special audition.
True Idolmaster (100)	Achieve the Producer Rank of Idolmaster.