The Bonetrousle Add-on for Groove Coaster has 6 achievements.
Play Bonetrousle 20 times
Play Bonetrousle and clear all of SIMPLE, NORMAL and HARD
Play Bonetrousle and get A Rank in SIMPLE, NORMAL and HARD
Play Bonetrousle and get S Rank in SIMPLE, NORMAL and HARD
Play Bonetrousle and get S+ Rank in SIMPLE, NORMAL and HARD
Play Bonetrousle and get S++ Rank in SIMPLE, NORMAL and HARD