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Horny Gamer also offers awesome hentai videos that will make everyone horny.
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.
Hentai (Japanese 変態, "perverse"; can also be understood as "shape-changing" or "weirdly shaped") is the term commonly used in the West for such games.
In Japan, the preferred term is Eroge (エロゲ, short for "erotic game").
Ever since the last Go P game he has made his own images for his games rather than ones snatched off the internet and his games are a lot more open.
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.