Forza Motorsport 4

There are a few ways to get this achievement. You can play through the campaign to get about half way there depending on the difficulty that you play on and you can play the Event List to gain the next 20+ levels. This achievement will be gained pretty easily through natural progression but you can also us the method below to level up much faster . Though if you’re playing the game to actually play the game this achievement is pretty impossible to miss. For those looking to just level up fast try the method shown below:

The faster the car the faster you will complete each race so I recommend using a R1 class car like the:

Ferrari - 2008 #90 Farnbacher Racing F430GT
Peugeot - 2011 #10 Team Oreca Matmut 908 HDi FAP

Thanks to IXXKHChrisXXI for uploading the video.