Pair of ex-Valve employees debuted their creation at Maker Faire 2013 and plans a retail offering with Kickstarter's help.

Although they were let go from Valve earlier this year, Jeri Ellsworth and Rick Johnson didn't want to abandon their work. The game developer had been experimenting with both augmented and virtual reality technology when it decided to bank on virtual reality, deemed a better fit for its products. But Ellsworth and Johnson were still excited about the potential of their augmented reality project. So Valve granted them legal permission to carry on with it, and the new technology — which they named castAR — made its prototype debut at this year's Maker Faire in Rome.

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