There is only one file type that uses the .WC extension:
Valve Hammer Configuration File
File created by Valve Hammer Editor, a mapping tool for the Goldsource engine that runs games such as Counter-Strike and Half-Life; contains configuration information for compiling maps into formats that are usable in the Source engine; configurations include Default, Fast, HDR Full Compile, Run Map in Engine Fullscreen, and more.
To create, remove, rename, or copy a WC file, click "Edit" and select the appropriate action (New, Remove, Rename, Copy).
NOTE: Hammer Editor is included in the Source game engine SDK.
CmdSeq.wc - The name of the file that holds compile profile information.
|Valve Hammer Editor||Free|
Updated: September 22, 2014