Hi Hazode, and welcome to Abandonia!
If you could explain a little more what you mean by "adult," we can probably be more helpful.
Of course, as has already been explained, AB does not host pornographic games such as hentai games etc. If however, you mean "adult" as in "risqué," then we can help you out
The (in)famous Leisure Suit Larry is
available here. or maybe you might check out
Rex Nebular and the Cosmic Gender Bender or have a look at the
Spellcasting 101 series.
Have a look around, I'm sure you'll find something you like