My PC is in the living room, so I'm using a Corsair Gaming STRAFE RGB Silent mechanical keyboard. The Cherry MX Silent keys are very silent for a mechanical keyboard, I've never heard my wife or daughter complaining about noise (unlike my xbox controller or steering wheel

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That's very unlikely. As Mor said, there are a lot more non-exclusive games on EGS. While 95% of the pc gamers will still buy these games on Steam, this 5% will result in a decent growth for EGS. Also, Chivalry 2 and Hitman 3 probably sold very well.