Valve chief Gabe Newell is officially a billionaire, according to Forbes' latest ranking of the world's wealthiest people.
GabeN is the latest game industry figure to join Forbes' list, making his debut at #854 (out of 1,226 global billionaires), after Valve had a huge 2011 on the strength of Portal 2 and Steam.
He didn't disclose his net worth to Forbes, but