Popular games published by company habupain

A survival horror game where you, as a protagonist, must escape and avoid the crazy yandere girl who wants you dead. The antagonist, Saiko-chan, is a psycho serial killer. She's a very unique type of yandere. She loves to play with you before she has a chance to kill you.

Saiko no Sutoka Halloween Edition is a spin-off of the original game Saiko no Sutoka, in which Saiko is a zombie anime girl who wants to play with her senpai, with the senpai needing to complete her parts and give her food to satisfy her hunger while simultaneously trying to escape.