Need for Speed 5 Porsche Unleashed possesses one of the worst collision-detection routines ever seen in a racing game. Need for Speed: Porsche Unleashed strays from several conventions previously established by the popular arcade-style exotic-car racing series. For one thing, like its name suggests, Porsche Unleashed features automobiles exclusively from one manufacturer. What’s more, the game has a more detailed, more realistic driving and physics model than its predecessors, though the game’s realism is scalable. And while Porsche Unleashed has a few minor shortcomings, it nevertheless stands as the most ambitious game in the series since the original. As such, it’ll more than likely make you love the Porsche on the off chance you don’t already.