In Sexy Adventures on Porn Island, you play as a castaway washed up on the titular* island. Once there, you soon discover why it's called Porn Island: the locals have a thriving industry filming porn flicks - and they're short a lead actor! Err, or something like that. So yeah, it's a terrible backstory, but this is porn. The plot's not important, right?
But what is important is that instead of filming the traditional way, on Porn Island they make films the sexy way: by playing puzzle games!