have their origins in the early 1980s, when Japanese companies introduced their own brands of microcomputer to compete with those of the United States.
There is no set definition for the gameplay of eroge, except that they all include explicit sexual content.
Like other pornographic media in Japan, erotic scenes feature censorship of genitalia, only becoming uncensored if the game is licensed and released outside Japan, unless produced illegally by doujin (usually with a construction kit like NScripter or RPG Maker).
Additionally, some games may receive an "all-ages" version, such as a port to consoles or handheld devices where pornography isn't allowed, which remove the sex scenes entirely.
They have produced the BL games Sweet Pool, Lamento: Beyond the Void, Togainu no Chi and Dramatical Murder, each one of the last two have been given a manga and an anime adaptation.
A 2006 breakdown of the Japanese commercial BL market estimated it grosses approximately 12 billion yen annually, with video games generating 160 million yen per month.