To open a PAK file, double-click on the file from your Windows machine. If it doesn’t recognize the file, you need to download a file opener or extractor such as WinRAR or WinZip.
What is a PAK File?
A PAK file is a compressed archive file similar to Zip archive files. If you have many files you want to share and distribute, you can compress them into one file with the .pak file extension. Rather than sending someone 10, 20, or more files, you can send them one file compressed with this file extension.
You do need a file compressor such as WinRAR or WinZip to compress in this format.
The PAK file format is commonly used for video games such as Quake, Hexen, and Half-Life.