pc Trails in the Sky 1st Chapter - .pac file

[Andree]

Seems like Nihon Falcom made their own file format similar to .p3a archive format from YS X (international version).

.pac file Sample.zip 

Edited August 21 by Andree
Changed text

[im__tem]

The file format itself isn't too terribly complex it seems? There's seemingly no compression for those files either (at least in the demo). I've written a basic file extractor, it's probably far from perfect though.pac_extract.py

[Thief1987]

26 minutes ago, im__tem said:

There's seemingly no compression for those files either (at least in the demo). 

I don't have demo, but data of the package in the OP is obviously compressed with LZ-like algo. Falcom usually used their own custom LZ fork afaik, though it's worth to try quickbms scanner on it

 

Edit hmm no, it seems you are right. These jsons looks strange, they look compressed in the beginning but later there are clear repeating patterns which shouldn't be there if data was really compressed. 

 

Edited August 21 by Thief1987

[Andree]

1 hour ago, im__tem said:

The file format itself isn't too terribly complex it seems? There's seemingly no compression for those files either (at least in the demo). I've written a basic file extractor, it's probably far from perfect though.pac_extract.py

Seems like you're late.
https://github.com/eArmada8/kuro_mdl_tool

They recently made a .pac extraction tool already.

[im__tem]

Oh well, guess that's just how life is