As any car mechanic will tell you, an engine is only as good as its weakest component. You can have the biggest turbocharged V12 in the world, but if a tiny bolt breaks, you could be in a heap of trouble. The same concept is true for making open world racers: having the best graphics, the biggest car roster and largest road network means nothing if the car handling is mediocre. Playground Games’ original Forza Horizon was the first open-world racing game I’ve played which gets so many key elements right. But is its sequel a big enough improvement to warrant a purchase?