If you like pirates you will have fun with this.
This free-to-play platform exclusive found inside PlayStation Home, six teams of up to four players each take to the high seas, blasting each other's ship to gather treasures on the sea. Increase XP and unlock exclusive content. You can access the Cutthroats though the navigation screen or navigate to Adventure District and there is a place on the Adventure island that you can practice cannon shooting or you can access Cutthroats if you are ready to go.
Play the role of captain or gunner Gather booty from sunken ships or purchase gold coins from the in-game store and exchange for power-ups that increase speed, damage, and range.
Select from a variety of ammunitions to hit your enemies with, earning XP for every successful attack and unlocking unique rewards as you make it through the ranks.
Also there's a teleport area near the docks. Kind of purple looking with sparkles. Navigate into it and it will take you in to the heat of battle area on the battle map. Simple game but fun.
Enjoy the adventure.