The Monsters Update in King of Seas introduces several new quests in game which once triggered will summon mythical sea creatures including a Basilisk, Abyssal Fish, Cursed Golem, and Kraken for players to fight and loot. The update also includes guardian sharks and crabs that defend treasure and shipwrecks; friendly encounters with whales and killer whales out in the open ocean; modified requirements for some questlines making them easier to complete; mouse support on PC so players can navigate the menus, shoot cannons, and move the camera with a mouse; and big quality of life improvements to make the King of Seas experience better than ever.