<p>Anyone who thinks PC gaming is in trouble hasn't heard of Steam.</p><p>Valve's popular PC game store and online service now has more than 65 million active accounts, the company announced, up 30 percent from a year ago. The number of PC gamers using Steam is now greater than the number of Xbox Live users, which stands at 48 million according to Microsoft.</p><p>Unmentioned by Valve, however, is how many of those users are on Windows, versus other platforms. It's probably the vast majority.</p><p>Valve has a big challenge ahead as it tries to make Linux the premiere gaming platform of the future. The company is preparing to launch SteamOS, a Linux-based open platform for living room gaming, and has promised a variety of " Steam Machines" to come.</p><p><a href="http://www.pcworld.com/article/2059229/steam-user-count-tops-xbox-live-ahead-of-valves-console-push.html">Keep reading...</a></p>