Here is the full list of all 18 东方异乡录 ~the Apocryphal Gensoukyou achievements.
Realize the true meaning of NTR.
Change heroines' clothes successfully.
Stop spoilers.
Realize the attack type of Shameimaru Aya.
Start to recharge the mana.
Finish the chapter 1 story.
Realize the truth of Marisa's smell.
The first time of arriving to Makai.
Speech with Marisa
Know the story of Alice's childhood.
Finish the chapter 2 story.
Realize the books name which is stolen by Marisa.
Have a test with Cirno.
Find the answer.
Prove the truth of the incident.
Finish the chapter 3 story.
Finish the ending story.
Finish the extra story.