Here is the full list of all 13 Yandere School achievements.
Push rival off the roof
Perform kill in toilet
A school nurse, who wants to catch up missed out on school love
Have some tea & cake
Already morning? Oh, that was not real...
Student of Class 2-1. She is arranged wife for Makio SONO. Transferred to same school to study with her future husband
That's a nice dream! I hope it comes true
School baseball team members. They insist to train all time with Makio and don't allow girls to be on the baseball field
Kill smoking character
I've gotta do something with these nightmares...
Student of Class 3-1. Came somewhere from Europe. She likes Maiko SONO and that's enough
It was just a nightmare...
Student of Class 2-1, Not a member of any clubs, Spends most of her time with her friend Eriko SAKURA