The mobile games industry has long been the poor relation of the PC and console markets, but a combination of new technology, services and investment is fuelling optimism that mainstream adoption is not too far off.
Ask anyone to name a mobile phone game and the most common response will be Snake or Tetris.
And while the classic Russian puzzler is the world's most played and downloaded mobile game it is not an accurate reflection of the industry.
At the Game Developers Conference in San Francisco this week the leaders in the mobile game industry have been preaching optimism about the future.
"This is still an infant industry, but it is growing quickly and expanding fast," said Rob Tercek, chairman of GDC Mobile.
"We are looking at an industry that is a $5bn (£2.5bn) industry overall, not bad for one that didn't exist 10 years ago," he said.
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