Shadow Sails

Shadow Sails was a one part mini-series that followed Shadow attempting the "Ultimate Ship Challenge" in Assassin's Creed IV: Black Flag. As far as I can interpret from the description, it was supposed to become a Let's Play Series, but it has not so far been re-visited. For the most part, it has remained unmentioned (at least in a major way) in other videos.

Edit: In a recent statement from Shadow on his Twitter, he stated the Shadow Plays series will continue later this summer, he plans to finish his Assassin's Creed IV: Black Flag play-through, and will then move on to play other games. The main reason he has been unable to continue with this series is due to the fact that he has been very hard at work on Stranded, Freescast War, R.O.I. Plus he also had many personal things to attend to, resulting in his absence from the Freecast and their community for nearly 3 weeks.

Shadow Sails (Shadow Plays) resumed on July 3, 2015.