Here is the full list of all 33 Corpse Party: Book of Shadows achievements.
Built and played a conversation in the EVP Machine.
Completed Chapter 8.
Completed Chapter 7.
Attained all endings in Chapter 7.
Completed Chapter 6.
Found all name tags from Renaissance Elementary School.
Completed Chapter 5.
Found all name tags from Koyo Girls' Academy Middle School.
Attained all endings in Chapter 4.
Completed Chapter 4.
Completed Chapter 3.
Attained all endings in Chapter 3.
Completed Chapter 2.
Found all name tags from Momijigawa High School.
Completed Chapter 1.
Unlocked Chapter 8.
Attained all endings in Chapter 1.
Attained all endings in Chapter 2.
Attained all endings in Chapter 5.
Attained all endings in Chapter 6.
Unlocked all artwork, music, and cast messages in the bonus menu.
Found all name tags from Matsukaze Prefectural High School.
Found all name tags from Takine Municipal Middle School.
Found all name tags from Seisho Junior High School.
Found all name tags from Karasuyama High School.
Found all name tags from Shobu University Middle School.
Found all name tags from Musashigawa Girls' Middle School.
Found all name tags from Komashiro Trade School.
Found all name tags from Reubens Academy Senior High School.
Found all name tags from Great Harbor Elementary School.
Found all name tags from Kurashiki Industrial High School.
Found all name tags from every school.
Attained all endings and found every name tag.