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