Seeking Female-MC rape/slavery loop

[dinowithonei]

No Escape might have this. It certainly does have the theme, with several bad ends in bondage or mind-control. It would almost be foolish of the dev not to make some of them perpetual to drive the point home.

I believe the petplay ending is indefinite + multiple other bad ends are playable but I don't think any of the other ones are indefinite

 

[Notablandname]

Haven't played this myself but

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[jakesmit]

Wings of Roldea have excellent infinite loops on defeat.