An Online Game You've Never Heard Of Made $1 Billion Last Year - Business Insider: "
CrossFire, a South Korean first person shooter by
SmileGate, took in nearly $1 billion in revenue last year, making it the most lucrative free-to-play game online, according to
Super Data Research....League of Legends comes in second on the list with $624 million earned in 2013. World of Tanks, World of Warcraft, Team Fortress 2, and Counter-Strike Online round out the top 10 with each earning well over $100 million during the last year."