Dota Underlords concept art.The new Stars of Blood art pieces were of particular interest to me as glimpses of another story-driven Valve game, but don't reveal much. The most surprising detail to me were what appear to be Combine dropships in one of the images, a possible hint to Stars of Blood having been intended to share a universe with Half-Life and Portal. I was also intrigued by the vaguely Giger-y, biomechanical cast to the character concepts.
The Underlords art shows off a kind of spooky, Halloween-y town, while Alyx and Dog features another set of rocky moonscapes with the titular characters. The Left 4 Dead folder features some alternate character art, as well as some scrapped zombie designs. The whole trove, as well as DYKG's deep dive into the subject, are a fascinating peek behind the curtain of an iconic and secretive developer. As an added bonus, the documentary was narrated by Clint Basinger, creator of retro PC channel