Painkiller (2004) PAK file extractor by Andrew Frolov
http://pkrc.ru/load/painkiller/programmy/raspakovshhik_pak_fajlov/28-1-0-95
It is a small .exe
binary along with the source code to build it.
Be sure to place
PainKillerExtractor.exe
with the file you want to extract in a separate folder so that the extraction will not mess the files in your current folder.
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Unpacking by drag-and-drop
You can simply drag and drop the .pak or .pkm archive to this application (drag the .pak archive with the mouse cursor to the .exe file) and it will unpack the resources automatically.
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Unpacking via CLI
.\PainKillerExtractor.exe PKPlus.pak
This tool is not suitable for level archives and system scripts. It may not correctly unpack some files.
Alternatively, use Painfull Extractor or Dragon UnPACKer.
pak2zip.exe
is an additional tool to extract .pak resources from Painkiller Exclusive Retail Demo (alpha version of Painkiller).