Dracu-Riot! from Yuzusoft first launched in 2012 in Japan. It brought with it a rather peculiar storyline.
It follows two friends who visit Aqua Eden, a Las Vegas-type location where both gambling and the sex industry thrive. But after getting kidnapped (and turned into a vampire!) the protagonist’s vacation becomes a new lifestyle.
With a concept like that, it’s hard to imagine Dracu-Riot! coming out as an all-ages release. However, that will actually be coming to Steam. Fortunately, Sekai Project’s Denpasoft brand shall also offer the 18+ edition for folks to enjoy.