Champion of Venus is an absurd, ridiculous, over-the-top porn game, and honestly, it's not that bad. The story and characters are pretty basic, but it's good fun that revels in it's own absurdity. I also loved the rats.
The art ranges in quality, from pretty good to somewhat lacking, and the actual fetishes here get a bit goofy, to the point that unless you're specifically into it (which for most of these I'm not) it can get kind of gross (the impaling stuff specifically is... yeah). But if you're interested in the genre and willing to look past those elements (or have already embraced them, in which case good for you) for some charming and at times decently funny dumb action (in both senses of the word) then give it a go.