The Valve Corporation recently started accepting bitcoin payments on the digital distribution platform Steam. The service offers some of the world's most popular video games, including Grand Theft Auto, Dota, Fallout, Team Fortress, and Counterstrike.
At any given time of the day, several million users are on the platform, the peak number of players logged in last weekend was just shy of 13 Million. More than 125 Million gamers had active accounts in 2015.
http://bravenewcoin.com/news/steam-accepts-bitcoin-with-bitpay/