NEW ORLEANS: If you've heard it once, you've heard it a million times. The reason why desktop Linux hasn't made it is because of its lack of games, Thanks to Gabe Newell, CEO of Valve and its Steam game platform that's not true anymore.

Newell pointed out Valve has actually been using Linux since 1999. "We use several hundred thousand game servers and use it internally as well for game servers. Internally we have 20 TBs of content, we go a year between reboots, and we delivered over an exabyte of data on the Internet in the year to date, which comes to 2 to 3 percent of the world's Internet." He added, "In all game companies, you'll find more reliance on and higher percentages of Linux usage."

"Linux is the future of gaming for gamers on the client as well because, besides Microsoft moving to a more locked-in style of computing, "Open systems were advancing much faster. The old console guys are not competitive and there's huge tension in proprietary systems." For example, Newell said, "it took us six months to get one update through the Apple store. Closed systems are at odds with the evolution of gaming."
So, Valve has been bringing its Steam games to Linux. There are now 198 Steam games running on Linux. The issues of bringing the games to Linux have been solved.
Valve CEO: Why Linux is the future of gaming | ZDNet