So, I came across some game called This is Football 2002 developed by SCEE London Studio. It uses some kind of structure that I can figure out until the 0x198 offset of each .pak archive there was in the game even if it stored only one file. Apparently it uses some kind of compression for the content table.

Here are the samples:
https://www.sendspace.com/file/j2ojrk

I could post the executable of the game too when the need arises.