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Valve Part 4: Half Times Two (1x20)

Air date: Nov 16, 2009

From Half-Life to Left 4 Dead 2, Valve has been one of the trailblazers of the video game industry. In this fourth episode of our retrospective, watch and see how Valve's long-delayed Half-Life 2 is finally unleashed onto the world next to Steam, its digital distribution service. Both were incredible gambles for the independent company -- both of which paid off in spades