Gold is the currency used to construct rooms, traps, and doors, and pay minions. In Dungeon Keeper 2, the heart has additional functions: regenerating mana (used to cast spells), doubling as a gold-storage area, producing Imps, and sending certain creatures to investigate threats it detects. The Dungeon Heart has the same purpose as the original game: it serves as the dungeon's life force.

Generally, the player starts out with a Dungeon Heart and some Imps. Some levels have multiple versions with differing methods of attack, allowing the player to choose the method and sub-region. There are twenty main levels in the campaign. The kingdom itself takes the form of a large table containing a 3D map where the player selects where to attack from the highlighted regions. All the underground lands in the kingdom must be conquered to recover the portal gems. The player controls the world with a hand, performing actions such as moving creatures around the map, casting spells, and interacting with specific items. Like the original, Dungeon Keeper 2 places the player in the role of a malignant overlord bent on world domination. The sequel to Dungeon Keeper, Dungeon Keeper 2 carries over many gameplay aspects, and adds new ones. An evil warrior known as the Horned Reaper (or 'Horny') believes he has the ability to remove Portal Gems from Harmonia, and has enlisted the player's assistance in conquering its realms so he can claim the Portal Gems. These devices have forced even serious dungeon keepers into retreat. Reginald has twenty Portal Gems, each assigned to a realm and safeguarded by its guardian. The kingdom of Harmonia, ruled by King Reginald, has been under siege from dungeon keepers for a while, and his wizards have devised a device known as a Portal Gem to confine evil creatures to the underworld, while still allowing good forces access. The game was later released on gog.com and Origin.

Dungeon Keeper 2 received positive reviews: reviewers lauded the graphics and artificial intelligence, although some reviewers criticized its similarity to the original. A PlayStation version, and a sequel, Dungeon Keeper 3, were in development but cancelled. Development was carried out by a team of around fifty people, who focused on the graphics on multiplayer. The game carries over many ideas from the original and adds new elements including units, rooms, and objectives. The player can also construct a dungeon without strict objectives, and multiplayer is supported over a network. In the campaign mode, the player is charged with recovering the portal gems from each area in order to open a portal to the surface. The sequel to Dungeon Keeper, the player takes the role of a 'dungeon keeper', building and defending an underground dungeon from the would-be heroes that invade it, as well as from other keepers. Dungeon Keeper 2 is a strategy game developed by Bullfrog Productions and published by Electronic Arts in 1999 for Microsoft Windows.

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