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It doesn't sound like a very logical acquisition for Google, but Valve's content distribution platform Steam is a good enough reason for Google to delve into gaming territory. With Steam, Valve has managed to do what no one else has: they've made it so easy and simple to download games that users are actually willing to pay for it even when they have a choice of pirating the same content for free. In numbers, it looks like this: 440 available games and over 15 million active user accounts.