https://www.pcgamer.com/corpse-party-book-of-shadows-a-grisly-japanese-slasher-game-is-now-on-steam-and-gog/

Corpse Party, "a grisly horror game set in a ghost-infested Japanese high school, with a branching story and lots of ways to end up dead," officially came to PC a couple years ago. The platform transition was a little confusing—not even publisher Xseed seemed entirely certain about what it would and would not include—but owners on Steam and GOG seem pretty happy with it. 

The follow-up, Corpse Party: Book of Shadows, went live on both platforms today, and it too sounds like a bewildering affair. "An anthology series that serves as a Corpse Party sequel, prequel, midquel, and alternate universe tale all in one, Corpse Party: Book of Shadows is a horror/adventure game developed by MAGES. (formerly 5pb. Games) and published under the supervision of the original series creators at Team GrisGris," the Steam listing says.