I'm sure that such a game wouldn't become pooular with the mainstream. You'd probably have to licence it yourself. However, if it was well-made, had a big enough variety of content to appeal to multiple tastes, and was reasonably accessible I'm sure it'd sell pretty well within the guro community. Keep in mind that the "obscene" content often found in guro works would make it more of a challenge to distribute and sell, so you might still not be able to get away with much.