Dungeon Keeper. As good today as it always was. Especially now I've got a widescreen mod.
"We have developed this area. It now serves as a breeding ground for our leigons of Beetles and Flies. To think it was once pointless farmland."
"The citizens here enjoyed each others' company so much, that we've decided to let them stay together forever. We've thrown them all into a big pit, and piled thousands of rocks on top of them."
"We've made an enormous magic carpet out of the thousands of verminous bunnies that flocked to the area."