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