I do Source Mapping but mostly for Portal and Portal 2. I'm the main mapper of Portal: Project-Beta, Blue Portals and I'm also a mapper for Portal: Alive and Kicking. I do mapping for other Source games such as Half-Life 2 also.
Going L4D1 Beta style, yo.
Well, the textures at least match, new map geometry
Uhhh, is this after you beat the chambers? (Blue Portals)
left for dead beta mod.