I do love a goblin game, and there are no shortage here. Indeed, there's precious little of anything else.
As other reviewers have noted, this feels like a stripped down version of Karryn's Prison - but being a variant on an excellent game is not necessarily a bad thing. However, the execution is lacking.
The 'plot' - I mean like in porn films, a plot is a nice addition, but it's not why we are here, which is just as well in this case - you are a sexy nun who has become a goblin sex slave, and you are cooperating with some other captives - a warrior, a mage etc - to try and escape. To do this, you need to seduce lots of goblins to increase your sex combat skills, and collect semen which is used in some of the magic rituals. The sex combat works like Karryn's Prison - you deploy skills to manage your and your opponents arousal so that you make them cum and don't get exhausted before they do. You will get pregnant. Pregnancy seems to last about 2 days, and then you'll give birth. Rinse and repeat. And repeat. There is some minor interactions with other captives, but otherwise it's just the same four goblin sex animations, over and over again.
And there's the rub - while the graphics are quite nice (although the goblin cumshot graphic is confusingly always an x-ray of ejaculating into a womb, regardless of whether it was a blowjob, handjob etc), the game is literally fucking repetitive. Watch the trailer, and you really have seen 90% of it. I can't really speak to the endings, because I gave up about halfway through, and this really is the kind of game I like. I would just play Karryn's Prison instead.
Edited to add - I was amused by the fact that in spite of weeks of goblin sex and births, the MC was still too prudish to leave her cell naked. It's all about dignity, right?