Mt. Kilauea addon - Dungeon Keeper

Sometimes you just need to express your dark side. In Dungeon Keeper, you're the boss of a horrible, rotten-smelling dungeon, and you must keep all of your loathsome, demonic creatures in line. If that weren't enough to keep you busy, your lair is continually invaded by hoards of idealistic "heroes" wanting to slay you, proclaim a triumph over evil, and go back to a village feast in their honor. What's an evil boss to do? Unleash your minions, set deadly traps, cast spells, and punish them with your torture devices. And most of all, teach those dumb do-gooders a lesson.