Valve collector shares his treasure trove of never-before-seen Half Life 2: Episode 3, 'Alyx & Dog,' and Stars of Blood concept art

pcgamer.com:

Following the release of its documentary on canceled Valve games, DidYouKNowGaming has made a collection of previously-unavailable Valve concept art free to download on the Internet Archive. The trove comes courtesy of David McGreavy, a games industry professional and self-professed Valve superfan.

McGreavy, who most recently was a marketing producer for 2K on games like Tiny Tina's Wonderlands, describes having multiple inside connections at Valve in the DYKG documentary. One such employee saved the pieces from being junked when Valve moved offices, and later sold them to McGreavy.

In addition to The Big One⁠—Half Life 2: Episode 3⁠—McGreavy's collection contains art for Left 4 Dead, a very early version of Half-Life: Alyx tentatively titled «Alyx and Dog,» Dota spinoff Underlords, and the mythical Valve space pirate game, Stars of Blood. The Internet Archive post also makes mention of «Counter-Strike: Source 2,» which is literally a joke game I kept proposing in the lead up to the announcement of Counter-Strike 2, the fifth game in the Counter-Strike series and follow-up to Global Offensive.

DYKG's video states that the office move which prompted this art being discarded occurred in 2016, so I'd presume the collection of de_dust mockups here were for a follow-up to 2004's Counter-Strike: Source, what would eventually become Global Offensive in 2011.

The Episode 3 pieces mostly consist of rocky, desert vistas filled with scrapped ships, all with another Combine Citadel looming in the background. Those might make sense as the arctic surroundings of the Borealis, the Aperture Science vessel central to Episode 3's planned plot, with the Combine's terraforming having transformed the environment into this wasteland. We also