>>92136
Good question, I remember reading something similar on the old doujinstyle.com forums that are sadly now gone(I've tried the waybackmachine to find that topic and it didn't work, maybe you will have more luck).
Anyway here is an infamous guro game that is available in a box with manual and everything!
https://www.myabandonware.com/game/divi-dead-byp
There is also a version available on PSP:
https://downloadgamepsp.org/divi-dead-eng-patch-psp-ppsspp-psvita-full-iso/
You can purchase the original full game on cd-rom with package, manual and everything on amazon and other such sites!
HF!^^