This is not a paid promotion or anything. It's GoG.com's (digital game retailer) platform to compete with Steam. It has a lot of the stuff Steam has. I think everything including broadcasting, actually. They don't have the more niche features of Steam like trading cards and community market. Quick Pro-Con: Pro: GoG lets you keep your games - no DRM. Con: GoG's restrictive policy re: DRM means some games, where the publisher requires DRM, will not be available on GoG. Steam is bigger. Your friends are more likely to use Steam, just because it's bigger. N/A: Pricing is generally the same between Steam and GoG. They both give the same amount of revenue generally to developers. Humble Bundle, and many other retailers, don't sell GoG keys. That used to be important, but Humble is no longer relevant. Less stories about anti-gamer movements from GoG relative to Steam. This is probably because of the size of the services. Steam has more customers, so they probably screw over many more customers (take away their access to their accounts) than GoG, just because they have more customers.