Niche simulators are quietly successful on PC, and there's an astonishing variety of them. There's OMSI, which sees you driving a bus around the streets of 1980s Berlin. Or how about Garbage Truck Simulator, which asks the question: Do you have what it takes to be a trash tycoon? And if you've ever wondered why train conductors earn $75,000 a year, try playing London Underground Simulator. It took me almost an hour, with a manual, just to start the engine. Then I overshot Edgware Road by about half a mile.