Anyone who has played a Need for Speed (sans the Pro Street Series) or Burnout Paradise will feel right at home with Forza Horizon

Good game minus a few drawbacks, the manic idiot street racers that wreck right into you, the fact you can't fine tune cars like on Forza Motorsports titles, the cornball

The world also has 100 breakable upgrade signs, each dropping upgrade costs by 1% for each you find and take out, Colorado also has a fully integrated day and night cycle, with nighttime having illegal street racing to participate in, speed traps for stretches of road and cameras for high speed snapshots for leaderboards,

Most Wanted, since, although you are racing in the streets, the game does not center around illicit street-racing.

How can you have illegal street races with no cops & mention cops over the radio but not see any cops?

However, there is an option to engage in illicit street races, and they also carry a hefty pot if you just so happen to win one

The theme is an event that takes place on closed roads (with the occasional illicit street races).