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