Editor’s note: Tadhg Kelly is a game designer with 20 years experience. He is the creator of leading game design blog What Games Are, and consults for many companies on game design and development. You can follow him on Twitter here.

To an outsider like myself, the Bay Area is the epicentre of a massive disruption which shook the games industry to its foundation. Call it the “San Francisco Revolution” – it was an unqualified success. It erupted through what we call social and mobile games on Facebook, iPhone and Android. It drew huge audiences, changed the fundamental economics of games and introduced a whole new language of play. It even went beyond games into what we now call gamification.

Many new companies sprang up all around the world based on the ideas of the revolution. Others who had been practising some of its principles already became global…

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