It seems that I understand - the .index file contains three blocks, two of which are compressed using ZSTD - these are file names and a table with the sizes and offsets of these files. The third block is the sizes of ZSTD frames, the game resource data itself is compressed in frames of 128 kb of the...

Here is my version of the .grp unpacker. Usage: unpacker.py -i "folder with archives" -o "output folder" However, I still couldn't fix some issues: 1. The script can unpack only first 131072 bytes of original file 2. .pk2 files cannot be extracted I also researched the .mdl file ...