Some eroge, such as those made by Illusion Soft, are just simulations of sex, with no "conventional" gameplay included.
Boys' Love (BL) games (also known as yaoi games) usually refers to eroge oriented around male homosexual couples for the female market.
Eroge was much less common on consoles - only NEC's PC Engine series had officially licensed adult games, and from the mid-90s, Sega's Saturn.
Both Nintendo and Sony disallowed adult video games on their consoles.
Eroge gameplay is often in the style of a visual novel or dating sim.
Oftentimes, voice actors who have voiced for eroge have been credited under a pseudonym.
Games aimed at a homosexual male audience may be referred to as bara.
The eroge company Nitro has a division that produces exclusively BL games, known as Nitro CHi RAL.
NEC was behind its competitors in terms of hardware (with only 16 colors and no sound support) and needed a way to regain control of the market. The first commercial erotic computer game, Night Life, was released by Koei in 1982.
Early eroge usually had simple stories, some even involving anal, which often led to widespread condemnation from the Japanese media.