Assetto Corsa has become so much a part of the sim racing furniture, it's difficult to remember a time before it existed. Like all great racing sims, AC nailed the fundamental handling first and foremost and then set about adding cars and tracks to taste. While there's plenty of racing machinery sitting on slick tires in there, such as the nuance of the physics model the game's actually rarely better than when you're slithering around in an E30 BMW M3 on far less grippy road rubber. We've never been keener to have less grip in a racing game.