In 1983, a company called Entertainment Enterprises, Ltd., released an arcade game called Swinging Singles which was mostly meant for bars, adult stores and sex clubs.
The game requires the player to drive through the city maze gathering dots like Pac-Man before reaching a brothel where the player is required to fight off venereal disease and collect keys to unlock sex scenes.
In a 1981 article in Time Magazine, On-Line reported that they were making a version of the game for straight women, though this never materialized.
In 1982, Japan's Koei, founded by husband-and-wife team Yoichi and Keiko Erikawa (and later known for strategy video games), released the first erotic computer game with sexually explicit graphics, Night Life, Also in 1982, the video game company Mystique released three unlicensed games for the Atari 2600; Beat 'Em & Eat 'Em, Custer's Revenge, and Bachelor Party.
These factors often led to widespread condemnation from the Japanese media.