Here is the full list of all 44 Koumajou Remilia Ⅱ: Stranger's Requiem achievements.
Defeat the Stage 1 boss Alice.
Defeat the Stage 2 boss Chen.
Defeat the Stage 3 boss Youmu.
Defeat the Stage 4 boss Marisa.
Defeat the Stage 5 boss Reimu.
Defeat the Stage 6 boss Ran.
Defeat the Stage 7 boss Yuyuko.
Defeat the Stage 8 boss Remilia.
Defeat the Extra Stage boss Yukari.
Defeat the Extra Stage miniboss the Three Fairies of Light.
Collect a total of 3000 souls!
Exterminate a total of 300 youkai!
View the Game Over screen.
Reach a score of 1,000,000.
Obtain all yukkuri types.
Clear Stage 1 without losing a life.
Clear Stage 2 without losing a life.
Clear Stage 3 without losing a life.
Clear Stage 4 without losing a life.
Clear Stage 5 without losing a life.
Clear Stage 6 without losing a life.
Clear Stage 7 without losing a life.
Clear Stage 8 without losing a life.
Clear the Phantasm Stage without losing a life.
Beat the Phantasm Stage boss Yukari without getting hit.
Clear all main stages on Hard mode.
Clear the Phantasm Stage on Hard mode.
Beat a boss with only throwing knifes.
Destroy 50 vases.
Destroy 100 candles.
Fall and die.
Eat 30 pieces of food.
Destroy 30 bones thrown by skeletons.
Stop time for 300 seconds.
Defeat five enemies at once using a partner attack.
Remilia drains the life from you.
Clear Stage 8 having destroyed all parts of the final boss, Remilia.
Beat a boss with only kicks.
Reach a boss area without attacking.
Collect all achievements in Koumajou Remilia 2: Stranger’s Requiem
Gather all information in the Character Collection screen.
Destroy 30 of Alice's dolls.
Get cut by thorns 5 times.
Defeat all fairy types.