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