Porn Game: Callisto-X - Version 1.21 by ProfessorX-10 Win/Mac

Callisto-X is an unofficial fan created version of Xavster_Gaming’s Callisto, enhanced , expanded with a twist.

Spoiler
Callisto-X offers an enhanced, more interactive, adult Sci-Fi Adventure Novel/game based solidly on the original but with many subtle changes and a new ending. For those who prefer a straight VN a walk through option has been added to help although one sand box area remains.

You play the role of a former military officer, trying to make a living as a free-lance interstellar trader and scavenger in the vastness of space aided by group of exotic & talented women crew members--not all of whom like you or trust you. But then fate unexpectedly casts you into the role of Galactic defender against an onslaught of ravenous, life destroying aliens led by an evil, powerful queen.
Will you save the Galaxy? Or will you DIE in the attempt?
Will you retire a happy Hero? . . . or be just another dead body floating in space?​

Callisto-X - Version 1.21 by ProfessorX-10 Win/Mac game preview

online.