Best Compression Methods for 'Specific' Games. Q&A

[infovs]

Originally Posted by KaktoR

Use d1 parameter

Of course d1 is used. This is not my first Unreal AES game that I archived. It did not help. Since it is Unreal 4.27 game, tried cls-ued4.dll also (I prefer it actually since it is usually faster at decompression than xtool with plugin), but this also did not help. Old version worked since it had ~32GB .pak file and nothing else. Current version is upgraded to IOStore container, there is .pak but it is ~12GB and .ucas is 32GB. Smaller .pak will decrypt fine (with -d1 of course) but .ucas is, as it seems, custom...