This is not an actual online game but just a flash game created by third party by someone. However it is very close to the original game. Only drawback is that it supports single player play only- you can't play multiplayer nfs most wanted online. Nevertheless, Need for Speed Most Wanted online flash game supports drag style racing and police chases like original one. You can play Need for Speed Most Wanted online from the link given below. Just click here to visit the site where you can play Need for Speed Most Wanted online for free.
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Need for Speed Free Download