If there’s a more fortunate variety of vehicle simulationist than the rail simmer, I’m unaware of them. While the likes of the truck, bus, boat, and airliner enthusiast might, if they’re lucky, have a couple of strong, singular, supported titles to choose from, the iron horse fan has, by my calculations, at least six. Up until the end of last year, I’d have classified three of that half-dozen – Derail Valley, Diesel Railcar Simulator, and Train Simulator Classic – as truly indispensable. Now Early Access Railroader has arrived, I’m tempted to say there are four ‘essential’ commercial rail sims.