Figure out meaning of "Unknown1"

[RevZero]

Refers to the value that can be viewed on the Diagnostic tab in the column "Unknown1".

Bytes 4-7 in savegame file.

The value seems to change on each save.

[danarcher]

@RevZero I believe that's the size of the header in bytes, i.e. the offset to compressed chunk data from the start of the save file. It changes all the time due to the save game name being part of the header. As far as I know in XCOM 1 the header was a fixed size, but in XCOM 2 it varies.

[RevZero]

@danarcher Thank you for the feedback. Currently, I do not have time to look into it, but I will give it a shot at some point.
You are of course welcome to help out and create a PR ;)