If you're hoping to get your game on Steam, here is an interesting article written by the data mining website SteamSpy. It covers geography, sales and genres, common misconceptions, and the way to succeed.
https://medium.com/steam-spy/some-things-you-should-know-about-steam-5eaffcf33218#.2jqvt7s97
I didn't realise the Russian market was so big.
More of there articles. https://medium.com/steam-spy