Japanese games with erotic content. Mostly in the form of Visual Novels.
There are different types of eroge;

Bl Game; A game focused on two males that.. uhmm.. You know. It does not necessaryli have to have erotic content in it, but most of them do. Eksamples on Bl Games, include; Hadaka Shitsuji, Kuro no Tsuki, And all of Nitro+Chirals games. (Bl stands for Boisu rabbu gamu)

Nukige; Lit. Fap game. Yeah, that pretty much gives it all. There does not have to be a story, people should just be able to fap to it.

Nakige; Games that make you cry your eyes out. These games are meant to have an emotional impact on the people playing it. This category includes games like, Clannad, Little Busters - All of the games made by Key, go under this category.

Otomege; Lit. Maiden game. It's a game where the main character is female, and is supposed to get as many guys as possible. This category includes games like; Starry sky, Uta no prince-sama etc. (Many of them get an anime after release of the game)

Galge; Games where the main character is a boy, and is supposed to get as many girls as possible.

Gl game; Girlsu rabbu gamu
Person A; "Damn, Dave spent his whole weekend sitting at home playing Eroge. He needs to get a social life."
Person B; "That's nothing! My sisters spends everyday playing Bl Games!"
by That Fujoshi from Alaska September 15, 2013
An ergoe, (erochikku gēmu) is a Japanese video or computer game that features erotic content, usually in the form of anime-style artwork.

In English, eroge are often called hentai games in keeping with the English slang definition of hentai. This is sometimes shortened to H games.

In Japan, eroge are also referred to as 18+ games
Since he doesn't have a girlfriend, John just stays home and plays eroge games all day long.
by Mobius_1 January 31, 2009
software that features erotic gameplay. requires lots o tissues. Also a software required for otaku to multiply. Must have different game titles to ensure otaku lifestyle.
bogart can't fap coz he cant play eroge on his pc
by tsundereBoy February 5, 2009
Al Gore Backwards. Erog la is a funny word
erog la=al gore!
ow shit i'm so retarded because i never knew that
by Joe C August 5, 2004