The collection of tf2 wallpaper 1366×768 are collect for you from the best photograph sources.
You have permission to download free by clicking the DOWNLOAD button under the photograph. It will open a new window. Do right click on the photograph, then take save picture as… After that you get permit to adapt the file name and the folder where you want to save the file. Then click the save button.
Here are the other collections corresponding to tf2 wallpaper 1366×768, may be useful.
tf2 wallpapers by Bielek on DeviantArt
Classic Team Fortress 2 Menu Theme Backgrounds and Classic
Team Fortress 2 Wallpapers High Quality