Plunder is a casual real-time strategy game in which you take control of a pirate ship and battle other players for towns and resources. Players navigate around a Settlers of Catan-style hexagonal board in their pirate galleons. Ships have three attributes: cannon, armor and speed, which can be upgraded as the game progresses.
Following the rule of threes, there are three resources required for upgrades: gold, wood and rum. Resources are acquired by capturing towns and villages or picking up the crates dropped by vanquished foes. Towns can also be upgraded to improve their cannon and armor ratings. Once a town is under your control, your ship can heal by anchoring next to it for a short time.