Dungeon Keeper 2 is a strategy game developed by Bullfrog Productions and published by Electronic Arts in 1999 for Microsoft Windows. 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. 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.