http://kotaku.com/thousands-of-p…

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1

Being a Pokémon master takes time and patience—beating a game in the franchise usually takes at least a couple dozen of hours. Now imagine trying to beat a Pokémon game while thousands of other people also control your avatar.P

Now imagine that these thousands of people will do whatever they want to your avatar, as they may not even care if you beat the game at all.P"

(Hmm, sharing from Kotaku didn't work for some reason :/)