Information about the .pak (pak) file type

Below is all the information we have available on file about the .pak (pak) file type.

.pak
WAD file that contains information about levels, settings, maps etc for Quake and Doom (games). A WAD file is an add-on file containing a customisation or new or replacement levels for the game.

Where this is available we would like to include file format information on .pak files, as well as information on how to view or open files of type .pak. If you know of any information which we have missed then please let us know.