Ok, I want to be the first one who submits an adult game...
This one is an fanmade game to the popular TV show "Buffy the vampire slayer". You play the role of Xander Harris and it's your goal to have sex with every female character of the show (and to solve the riddle of an mysterious siren of course).
Being a big fan of the TV show I liked the game, because it has a Buffy-like plot (could have been an episode except for the nude scenes) and you have to solve some real puzzles to complete (there are many adult adventure games which don't have puzzles at all).
There are no pornographic pictures inside the games (but pornographic texts), but there is a lot of explicit nudity. Of course you can see clearly the the nude pictures are faked, but this is part of the fun
Download link: http://curlysworldoffreeware.com/game_i ... ?gameid=68
Download size: 6.4 MB
Year: 2002 (?)
License status: Freeware. Can be distributed freely (manual in game folder)