I'm a cheapskate so I ain't paying for my porn. Brief overview of collections.
Quality: Games which I have tested and enjoyed. Usually provided at least a few hours of enjoyment. Except Curly's Caves, I just like that one.
Just Sex: Don't expect much, if any, story or depth. Mostly interactive sex scenes or minigames.
Untested: Candidates for Pron, but haven't confirmed lewd content yet.
For other lewd content check the erotic, porn, hentai, and nsfw tags, lewd game jams, and other more porn focused websites.