Revenge of the Plague Lord is an expansion pack for a role-playing match-three hybrid Puzzle Quest: Challenge of the Warlords. It puts a new explorable zone on the game map to the southeast of the existing area and a new quest line with over 25 missions and a boss at the end. This add-on also brings four new player character classes: Bard, Ranger, Rogue and Warlock, raises level cap to 60th level, and includes 40+ new magical items and 50+ spells.