This year it coincides with the kickstarter of a kickass RPG supplement SINK! A DnD supplement filled with magical tattoos, adventures, lore and more. Also featuring loads of art from the infamous artist Samurai Rusk, known for their hundreds of celebrated Critical Role tattoos.
Would you like the battle map, soundtrack mp3, and additional resources for a SINK one-shot in Deep Grotto? Here's the Google Drive link (53MB).
Personally I love that vessel-boarding/storm-the-castle aspect of pirates. There is another supplement for naval combat known as Limithron's Guide to Naval Combat available for purchase or by the link below for free. The link to the guide itself is here (11MB)
There's more!
As of this post it has only been officially announced in an email notification. This Tuesday will feature a Critical Role episode of Everything is Content with Taliesin and Marisha playing SINK! with Samurai Rusk, Ricardo Esquivias, and Johnny Stanton IV.