You can create a classroom with 25 students complete customizable (the male customizations are really poor compared to the female ones) and then see how they react with each other.
It creates some funny and enjoyable scenarios and some sweet 3D hentai scenes; it's actually pretty complex (and over 6gb). A sequel of this game known as Artificial Academy 2 was released on 2014. Artificial Girl 2 and 3 (also called Jinkō Shōjo 2 / 3), are two "3D erotic life simulation games" where you play as a young male on a island full of girls. A not-turn-based RPG hentai game with a good plot and enjoyable kill everything game play.
We also have a page for Adult interactive Fiction for smut made by non-Japanese writers.
ZONE games aren't really games, but sweet Jesus does 4chan love them and each one is well-made. Another Illusion game, so it's good stuff as usual.
No eroge novels (aka 'erotic visual novels') in this list: there are so many of them that we have made a page just for them.
The most famous selection of premium porn sites, free porn tubes, sex live cams and more, all bookmarked on My Porn Bible.
This list is divided in different "books", one for each category, collecting the different websites as links.
You can get it and the full game from the author's blog: You play as Raidy, an adventurer, wandering the continent of Else.
You play it like an old first-person dungeon explorer, only with random naked chicks to play with.
There is also a worthy sequel, and the finale released.