Farm Ville is one of the most popular games ever available on Facebook. Now this game can be played outside the social network at Microsoft’s MSN Games.

Gamers who want to play the game FarmVille MSN Games edition has required their Facebook ID to login and play.

Of course this move would increases the popularity of the game several times, but the question is that why someone would login on MSN Games instead of Facebook to play the game using Facebook ID?