TF2 master-maps offered to modders
Valve takes pressure off. Eager to learn.
Valve has updated the Source developer kits to include 10 original Team Fortress 2 maps.
Beginner modders can use these as foundations to build on, while more experienced modders may relish the opportunity to explore professional work.
The maps offered are Lumberyard, Ravine, Badlands, Dustbowl, Granary, Gravelpit, 2Fort, Badwater, Goldrush, and Hydro.
Valve plans to get more TF content into the Source developer kit in the future, according to the TF2 blog - including maps and character models.