The Touhou Onganmu Add-on for Groove Coaster has 10 achievements.
Play Touhou Onganmu 20 times
Play Touhou Onganmu and clear all of SIMPLE, NORMAL and HARD
Play Touhou Onganmu and get A Rank in SIMPLE, NORMAL and HARD
Play Touhou Onganmu and get S Rank in SIMPLE, NORMAL and HARD
Play Touhou Onganmu and get S+ Rank in SIMPLE, NORMAL and HARD
Play Touhou Onganmu and get S++ Rank in SIMPLE, NORMAL and HARD
Play Touhou Onganmu and get A Rank in EXTRA
Play Touhou Onganmu and get S Rank in EXTRA
Play Touhou Onganmu and get S+ Rank in EXTRA
Play Touhou Onganmu and get S++ Rank in EXTRA