The second entry in Sogna's long-running Viper franchise, Viper V-8 has the same format as its predecessor: three separate short stories with minimal interaction and animated sex scenes. The three stories are: Friday the 18th: Obviously, a parody on horror movies, telling the story of three young girls who were sexually assaulted by mysterious masked men when camping near a …

Viper V-6 is the first in the long-running Viper series of animated adult games. It contains three separate stories: The Devil Came tells the story of a teenager named Ogawa, who was unpopular in his class and summoned a demon to exact revenge. But the demon turned out to be female, so his wishes naturally assume a different direction... Afternoon …

In this pre-Viper game by Sogna, an elderly mahjong master with no sons seeks a male successor. When he discovers the protagonist, he offers him one of his three daughters for a wife. His daughters, Rumi, Miyabi, and Yumika, disagree because they've never met him, so the old man suggests they play strip mahjong with him in order to get …