There are few game developers that carry themselves as mysteriously as Valve does. What happens behind those doors among all those sliding desks? What has Valve worked on, deemed not good enough, and subsequently scrapped? 

Some answers — surely not all, but some — are coming soon enough. Geoff Keighley has been working on a documentary about what Valve has been up to for the past decade, all framed around the recent release of Half-Life: Alyx. Here’s a new trailer:

Sign me the heck up for Geoff Keighley's documentary on the past 10 years of Valve screenshot

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Source: Destructoid Sign me the heck up for Geoff Keighley’s documentary on the past 10 years of Valve