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