>>11371381
Probably my favorite playable bad end was the demihuman cave in Sinisistar 2, it wasn't very systematic but the way it branched from being captured was cool, and of course the game in general is super high quality. You're forced to either take a difficult fight with most of your abilities locked away, or continue passing time and going through rape scenes. If the protag gets pregnant it unlocks an actually final bad end, but I love that she can be trapped forever.

I just kinda wanna gush about it, I've never felt as immersed in a captured sex slave fantasy as that.