What is Vtf File format
Vtf extension is related to Valve Texture File. You have chance to open vtf files with VTF Explorer software.
These are the texture files which used by the producer of the Valve game. These files which are similar with image files are used for coloring different places and characters in this game. You will need Vtf Explorer software to open vtf files. If you need to learn more about VTF Explorer software, please check the following web page.
Related software about Vtf files.
VTF Explorer or Texture packer for games
Vtf file software links.