Valve announces a number of product and technologies at this week's Game Developers Conference (GDC) in San Francisco. "We continue to see very strong growth in PC Gaming, with Steam growing 50% in the last 12 months," said Gabe Newell, Valve's president. "With these announcements we hope that we are helping build on that momentum." Steam Machines, Windows PCs, Macs, and Linux PCs will be ab... more.