Here we go again with another groundless rumor from the community!
An inside source? Is it your grandma?
The images in the OP were lifted from MY album of SOB concept art
http://imgur.com/a/AiCRE#0 uploaded SEVEN MONTHS AGO and with 60,000 views - They're from my album for two reason: 1.) I added the "may or may not be SOB" text and 2.) you can see the flash navigation arrows at the bottom of the images as a result of my lifting them from Peter Konig's portfolio
http://www.peterhkonig.com/, and it looks like most of the images are still on there.
I also emailed Peter seven months ago asking about the images and he said:
Some of it is mine, not all. Can't comment on it either way.... Some of it is on my site now, so it can't be toooo sensitive, now can it?
And the name is bullshit. Someone is just trying to build credibility with their rumor by giving "SOB" a name. But it's bullshit.
More resources:
http://www.valvetime.net/threads/pe...-unknown-valve-ip-sob-and-left-4-dead.181897/ - Initial findings
http://lambdageneration.com/posts/f...sob-and-a-possible-half-life-prototype-level/ - Brief clip of "SOB" in Gray Horsfield's demo reel.