Direct conversion isn’t possible unless it’s truly a renamed archive. Use the extraction methods above, then recompress. Converting to ISO would require burning extracted files to an image – no direct .cpk → .ISO tool exists.

As a .cpk file, it is highly optimized. It allows the game to load hundreds of high-resolution textures and 3D models without significant performance drops on PC or PS4.

I've come across a file named Dt30-g4.cpk on my system. I'm not entirely sure what application it belongs to or what it's used for.

The file is a critical data file used in Pro Evolution Soccer (PES)

No bond information is stored — only atomic positions. In some implementations, .cpk files may just contain x y z columns without residue info.

It likely contains: