One of the great things about fantasy roleplaying adventures is the vast variety of locations you can set them in. From the dungeons that started it all to forests, mountains, cities, and even bizarre planes of existence, the options are virtually limitless. Yet perhaps one of the least represented is the seafaring adventure. That’s not to say that they are never seen, just that the vast majority of Pathfinder and D&D adventures tend to be set on solid ground. The Skull & Shackles Adventure Path is a notable exception, and so is the adventure Plunder & Peril.
In fact, Plunder & Peril is presented as three mini-adventures that can be linked together to form one longer one or played separately. However, despite this presentation, I question how effective these adventures would be as stand-alones. The first would work reasonably well on its own, but the other two are too dependent on the set-up of the ones before it. As such, they will be far less effective run on their own and much more satisfying if run together.
The quality of the three adventures does vary though, with the first two being good and the third being weaker. Put together, they make for an adventure that starts strong, stays relatively strong, then ends weakly, making the whole average out to about mediocre. There are also a lot of ways in which the PCs can “derail” the adventures and there aren’t a lot of options for what GMs can do if this happens.
SPOILERS FOLLOW (including minor spoilers for Skull & Shackles)