How to open .RAD file extension?

If you cannot open a new file that has been saved in the .RAD format you need to download the appropriate software. The manufacturer of .RAD files is Valve; .RAD files belong to the 3D Image Files category. After downloading the application from the list available on our website just run an unknown file, and as the default set the newly installed application supporting the .RAD files. Activities performed in the order described should solve the problems with all the files in the .RAD format.

• What is .RAD file?
• How to open .RAD file?
• What is .RAD file?