Trying to determine what specific compressor was used in compressing the file images.dta?
This file is part of the game "Nightmare Adventures - The Witch's Prison". Downloadable from here -
The file images.dta is 212 190 501 bytes in size.
The file seems to extract OK using 7zip. But on re-compressing file contents (as a zip file), the compressed file size does not match the original file size, despite trying different compression settings! The new compressed file size is usually smaller than the original. This is of some concern, as ideally the original and re-compressed file sizes should match. Although I understand a (slightly) smaller file size might still work, but this is dependent on the game software and how it reads this file.
Using a hex editor, the file header reads -
This suggests the images.dta file was compressed using a compressor using (a variant of the) "zip" algorithm(?)
Can anyone please confirm which specific compressor was used, and verify that re-compressed data (using the same compressor?) is the same as the original images.dta file?