Dungeon Keeper (1997)

In Dungeon Keeper, the player builds and manages a dungeon, protecting it from invading 'hero' characters intent on stealing accumulated treasures, killing monsters, and ultimately the player's demise. The ultimate goal is to conquer the world by destroying the heroic forces and rival dungeon keepers in each realm. (Wikipedia)
Genres: Simulation, Strategy
Platforms: Windows, macOS, MS-DOS
Franchise: Dungeon Keeper
Developer: Bullfrog Productions
Publisher: Electronic Arts