In Monsters of Loch Lomond, you are the leader of a Scottish clan that is competing with other clans for control of the Loch Lomond area. Each night, monsters come out of the foggy waters of the Loch and attack the local settlements. Your clan must defend itself and chase these monsters into the highlands or towards rival clans. The goal of the game is to find where the monsters are hiding, chase them away and make your clan the strongest one in the area, giving you a strategic advantage over your rivals.