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