Don't even think about downloading any of these unless you're 18 or older. And don't even think about downloading any of these if you're over 80, you might give yourself a heart attack.
Masq
You'll need to lie, cheat, break the law, and have lots of sex to succeed in Masq. This adventure title plays like an interactive pulp fiction comic.
Download it now.
Above: Play Red Light Center at your own risk. You might get spanked by this guy
Red Light Center
You might want to take a penicillin shower if you decide to visit Red Light Center. This adult oriented social networking game is like Second Life - only with more sexual deviants (if you can believe that).
Download it now.
Softporn Adventure
Before you get too excited, note that this is a text adventure from 1981. In fact, it's the only text-only game ever released by Sierra. The box art features Roberta Williams in a hot tub.
Download it now.