Lords of Waterdeep: Scoundrels of Skullport adds two new expansions to the Lords of Waterdeep board game – Undermountain and Skullport – inspired by the vast dungeon and criminal haven under Waterdeep. The Skullport expansion adds a new resource to the game, Corruption, while the Undermountain expansion features bigger quests and more ways to get adventures. Players can choose to add one or both expansions to the base game.

Lords of Waterdeep: Scoundrels of Skullport also includes new Lords, new Buildings, and materials for a sixth player.