Brings back such fond memories.
Although this may get a bit repetitive near the final levels, it still remains relatively fresh, due to the inifinte ways you can construct your dungeon. The creatures themselves are animated quite well, and they each have their own unique was of doing things. The story is simple, but the game is more gameplay driven than story driven. Unfortunately, that is one of Dungeon Keeper's downfalls. There is no real story, except for crushing every opponent that comes at you. But thats what makes it so cool and addictive. You, the evil lone rebel destroying all the innocent people.
The music, although not astounding, is very fitting for the scene. Because you are playing miles beneath the surface, you have eerie music that really adds to the overall effect of the game. the creature noises are excellent too. Even though its been a couple of years, I can still remember clearly the sound of a bile demon as you slap him.
All in all, I would recommend this game to any strategy player, looking for something old school. As well as conquering enemies, it is also a "city-builder" due to the fact that you have to build up your dungeon, and make it "appealing" to your evil army of creatures. Good luck keeper, its one hell of a game.