A few Left 4 Dead license plate reference photos I've found.

[Bruner]

Hello! I did some digging on Google a couple minutes ago, and I was able to find three of the original license plate photos used on the textures of various different cars across Left 4 Dead, Left 4 Dead 2, and CS:GO.
Top right, bottom left, and bottom right are the ones I've managed to find so far.
If someone can help with tracking down the rest, that would be great!

The plates all appear to originate from Pennsylvania (location of No Mercy), Georgia (location of Dead Center), and Louisiana (location of The Parish). It seems Valve did their homework, ey?

The hardest to find will probably be the first two license plates. In Left 4 Dead 1, they appear as Pennsylvania license plates, while in Left 4 Dead 2, they were changed to a generic parody of Louisiana license plates that simply read "America." which is odd since "Louisiana" appears on the license plates of the police car and taxi in Left 4 Dead 2.
So they're like this weird mix of a Louisiana plate, but with the font of a Pennsylvania plate.

[Bruner]

First two license plates seen in the first image as they appear in Left 4 Dead 1 as stated above.

You know. I'm probably the only person in the universe that cares about this, but eh, I thought I'd share anyway.

[TheAwesome98]

You know. I'm probably the only person in the universe that cares about this

we all find different things important

[hl2 combine beta]

Skull emjio