You might give KeeperFX a try. It's a mod that reuses the existing exe file but builds around it. IIRC it allows higher resolutions, adds more maps/campaigns and makes it possible to run Dungeon Keeper on newer Windows versions without problems.

Try KeeperRL: http://keeperrl.com/

Started getting some attention in the roguelike world but it's really not a traditional roguelike... just an awesome Dungeon Keeper-esque game.