The PIXEL STAR Add-on for Groove Coaster has 10 achievements.
Play PIXEL STAR 20 times
Play PIXEL STAR and clear all of SIMPLE, NORMAL and HARD
Play PIXEL STAR and get A Rank in SIMPLE, NORMAL and HARD
Play PIXEL STAR and get S Rank in SIMPLE, NORMAL and HARD
Play PIXEL STAR and get S+ Rank in SIMPLE, NORMAL and HARD
Play PIXEL STAR and get S++ Rank in SIMPLE, NORMAL and HARD
Play PIXEL STAR and get A Rank in EXTRA
Play PIXEL STAR and get S Rank in EXTRA
Play PIXEL STAR and get S+ Rank in EXTRA
Play PIXEL STAR and get S++ Rank in EXTRA