Dungeon Keeper (ISO)
You're the bad guy looking to protect your hard-earned gold and resources from the repetitive incursions of irritating do-gooders and rival keepers. Fortunately, you'll have plenty of tools at your fingertips to help keep the enemy vermin out and your own vermin happy. You will build lairs for them to live in, hatcheries to feed them, and training rooms to hone their skills. More advanced rooms like libraries, workshops, prisons, and graveyards will help you attract new minions and research and manufacture new structures as you confine, and confuse, your enemies in your newly constructed palace of pain.
Works perfect on XP.