Fortress of the Witch King on the Commodore 64. It combined text with a big map that starts out as mostly a black screen, but uncovers forest, mountains, towns and water masses as you send out scouts to map an expanding area. When you have acquired enough troops in this turn based RPG, you enter the fortress which is like a maze until you find and defeat the witch king. There was no back story to explain why he deserved to die, but the name tells you something.