So this is my theory on how Valve software got their game startup logo. No skepticism needed-- I'm pretty sure this is the only way they could have gotten that image.

This movie takes place during 'The Passing' chapter. I was hoping to have this out the night that 'The Sacrifice' DLC came out, but it took a bit longer (as with all personal work). If you don't get it, you either have not played a L4D game or a Valve game. If this is the case, what the hell is wrong with you? Go play one already!

If you left a review, thank you! I DO read them all, so if I didn't respond to yours, you can still be sure that I read it. Much appreciated!

Edit: Frontpage!? YESSSSSSSSSSS!!! Thanks, NG!
Edit 2: Over 250,000 views!? Very cool. And just a note- I'm well aware that there was a previous logo. I played HL when it first came out. This movie has to do with the CURRENT logo!
Edit 3: What's that you say? Valve made this logo before l4d? Well you forgot one very important fact-- Valve has a time machine.