Today we're releasing an update to the Source SDK that includes the .vmf source files for many of the official TF2 maps. This is something we've wanted to do for a while, especially as we've been growing the range of game modes in TF. Here's the list of maps that are included in the update: Lumberyard, Ravine, Badlands, Dustbowl, Granary, Gravelpit, 2Fort, Badwater, Goldrush, and Hydro.