Dig underground tunnels, build rooms and attract creatures at your service, then use your army to annihilate your enemies. Each room has a different use and can attract a specific type of creature, so it's up to you to build the best hive possible. You can even build traps or research new spells to improve your defense capabilities.
I always loved Dungeon Keeper(II), since the disk died, I can't play it anymore :( so this will replace it untill War for the Overworld is out , well done :D