[Masquerade]

UnrealPAK is OK, however if you are extracting ue4 paks I recommend using quickbms.

If any key is needed, it prompts you at the start of the extraction process.

There's a script on Luigi's site, but there's also updated scripts which have better chance of working on cs forum (not entirely sure I'm allowed to link it for obvious reason). This thread contains long list of keys also.

@Joe you'll need to specify the key in order to decrypt/extract the pak - regardless if the full pak is encrypted or only Table of Contents.

All ue4 games run fine when their pak files are unpacked.