the PDF is EVERYTHING you need to run the game for both the players and the GM. This system can easily be supplemented with additional rpg goodness to extend the pirate adventures out. The required resources are light, you can run the game with 6 sided dice, which is nice for those who aren't invested in the dice ruled rpg world. It also has rules to handle using minatures too in case that is your thing. It feels like it was writen to bring in new people to world of tabletop gaming, but it was also writen for those Veterans who want to explore the high seas with a light set of rules. This makes a great 1 session, or 5 session game system :D