If Steam is your audience and you're seeking inspiration, check out the stuff by CrazySky3D. Most of their stuff is on Steam and it's quite visually pleasing. Especially is one is into bulgings, cum-flation, horse-cock Futa on female. Don't think it's made in Daz, but it does pretty well. Story is generally terrible or non-existent, so if you can have a decent story with Futa on female, you definitely have an audience on there. As long as there is no Futa on male I would buy it.

As far as existing Futa MC games made with Daz, Having a Hard Time is only one I can think of that's any good, and it takes forever and a day to update.