Tue, Jun 16, 2009 | 07:48 BST
Valve releases TF2 map source files
Valve’s released source files for some of the official Team Fortress 2 maps, as detailed in this blog post.
Maps included are Lumberyard, Ravine, Badlands, Dustbowl, Granary, Gravelpit, 2Fort, Badwater, Goldrush, and Hydro.
For aspiring map-makers, this essentially allows you to edit existing levels instead of having to start from scratch.
Full thing through there.