Here is the full list of all 15 Touhou: Scarlet Curiosity achievements.
Defeated Mokou in Bulllet Hell mode.
Saw the true ending.
Reached Lv. 99 as Remilia or Sakuya.
Raised Remilia or Sakuya's item drop rate to 300% or higher.
Dealt over 10,000 damage in a single hit as Remilia or Sakuya.
Raised Remilia or Sakuya's HP above 5000.
Bought a capsule toy at the Kourindou shop.
Saw any of the endings.
Spoke with Reimu at the Hakurei Shrine.
Defeated Mokou.
Have more than 300,000 coins in your possession as Remilia or Sakuya.
Landed a chain of 100 or more consecutive hits as Remilia or Sakuya.
Raised Remilia or Sakuya's critical hit rate to 50% or higher.
Defeated Patchouli in Bullet Hell mode.
Defeated Flandre in Bullet Hell mode.