The DOTTED 8TH Add-on for Groove Coaster has 6 achievements.
Play DOTTED 8TH 20 times
Play DOTTED 8TH and clear all of SIMPLE, NORMAL and HARD
Play DOTTED 8TH and get A Rank in SIMPLE, NORMAL and HARD
Play DOTTED 8TH and get S Rank in SIMPLE, NORMAL and HARD
Play DOTTED 8TH and get S+ Rank in SIMPLE, NORMAL and HARD
Play DOTTED 8TH and get S++ Rank in SIMPLE, NORMAL and HARD