D.O.
A futuristic combat game where you attempt to rescue girls being attacked by tentacle demons. Has a fair amount of depth, hentai scenesevery battle, and also a feature where you romance girls to get their 2nd level weapons. Some basic
instructions are also available. Interestingly enough, you could buy a Windows 95/98 version from the manufacturer's website prior to 2020. This game was remade within the last ten years for the PC.