You're looking for "The Legend of Zelda: Tale of the Fourth Goddess". It's the design for a smutty fan-game using the A Link to the Past tileset, with a script and a bunch of reference images (generally traced and modified from existing images, which are thoughtfully included). It came as a zip file.
I don't know where it came from originally--Google hasn't turned up any hits--but I found a copy I'd archived. I've reuploaded it here:
http://www.mediafire.com/download/ck...2xqqan/gam.zip