Here is the full list of all 60 TouHou Nil Soul achievements.
Beat Easy Reimu
Reach 60% accuracy in a mid-stage minigame.
Complete Touhou Nil Soul.
Fail 10 battles.
Win 30 battles.
Possess all kinds of weapons, armors, and accessories in your inventory.
Beat Normal Reimu
Beat Hard Reimu
Beat Lunatic Reimu
Beat Extra Reimu
Beat Easy Rumia
Beat Normal Rumia
Beat Hard Rumia
Beat Lunatic Rumia
Beat Extra Rumia
Beat Easy Daiyosei
Beat Normal Daiyosei
Beat Hard Daiyosei
Beat Lunatic Daiyosei
Beat Extra Daiyosei
Beat Easy Cirno
Beat Normal Cirno
Beat Hard Cirno
Beat Lunatic Cirno
Beat Extra Cirno
Beat Easy Meirin
Beat Normal Meirin
Beat Hard Meirin
Beat Lunatic Meirin
Beat Extra Meirin
Beat Easy Koakuma
Beat Normal Koakuma
Beat Hard Koakuma
Beat Lunatic Koakuma
Beat Extra Koakuma
Beat Easy Patchouli
Beat Normal Patchouli
Beat Hard Patchouli
Beat Lunatic Patchouli
Beat Extra Patchouli
Beat Easy Sakuya
Beat Normal Sakuya
Beat Hard Sakuya
Beat Lunatic Sakuya
Beat Extra Sakuya
Beat Easy Remilia
Beat Normal Remilia
Beat Hard Remilia
Beat Lunatic Remilia
Beat Extra Remilia
Beat Easy Marisa
Beat Normal Marisa
Beat Hard Marisa
Beat Lunatic Marisa
Beat Extra Marisa
Beat Easy Flandre
Beat Normal Flandre
Beat Hard Flandre
Beat Lunatic Flandre
Beat Extra Flandre