So turns out I'm really into "Guro" but I can only find images online of this. Is there any kind of hentai videos in which the girl is getting cut up, impaled, amputated, etc?
There's a couple of characters that have bloody scenes in the femdom/monstergirl game Violated Hero 3. The first girl is a rose-monster that wraps thorns around the protag's dick while fucking him to death, and a couple of later characters cut him up repeatedly (while fucking him to death).
Most of the scenes are more vanilla though.
I'd send you to gurochan, but the present iteration is almost deserted, and doesn't seem to have many game threads on either /req/ or /p2p/.