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

[pslove]

Hey guys, what's the best method for The Walking Dead Definitive Series? I'm using DiskSpan GUI btw. Thank you.

[Masquerade]

Originally Posted by pslove

Hey guys, what's the best method for The Walking Dead Definitive Series? I'm using DiskSpan GUI btw. Thank you.

Telltale game, so all of the ttarch2 files that have headers beginning with ECTT are encrypted using Blowfish encryption.

In this case, DiskspanGUI has nothing to handle those files. I would use cls-ttgd by Shegorat, but that isn't a public tool.

Use this to decrypt the files: https://www.fileforums.com/showthread.php?p=483980

Then, compress with xtool(zlib+reflate)+srep+lolz. You can re-encrypt your decrypted files from earlier using the same tool to get MD5 perfectiom upon installation.

[pslove]

Originally Posted by Masquerade

Telltale game, so all of the ttarch2 files that have headers beginning with ECTT are encrypted using Blowfish encryption.

In this case, DiskspanGUI has nothing to handle those files. I would use cls-ttgd by Shegorat, but that isn't a public tool.

Use this to decrypt the files: https://www.fileforums.com/showthread.php?p=483980

Then, compress with xtool(zlib+reflate)+srep+lolz. You can re-encrypt your decrypted files from earlier using the same tool to get MD5 perfectiom upon installation.

I did this and the compression took a while but the results are dissapointing:

-------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------- CONVERSION DATE 15/05/2022 -------------------------------------------------
-------------------------------------------------------------------------------------------------------------------------------------------
 11:52:56 - Deleting files from the output folder.
 11:52:56 - Files have been deleted.
-------------------------------------------------------------------------------------------------------------------------------------------
 11:52:56 - You have chosen the DVD5 type for the media size.
 11:52:56 - ISO images will not be created when conversion is complete.
 11:52:56 - The computer will remain on when the conversion is complete.
 11:52:56 - Selected ARC/DS method for Setup-1a.bin was: xtool:mzlib:mreflate+srep_new+lolz
-------------------------------------------------------------------------------------------------------------------------------------------
 11:52:58 - Compression initialized in 15/05/2022 at 11:52:58.
 11:52:58 - Starting Setup-1a.bin archive creation.
 21:19:03 - Moving Setup-1a.bin » Setup-10a.bin files to media folder.
 21:19:05 - Compression finished in 16/05/2022 at 21:19:05.
-------------------------------------------------------------------------------------------------------------------------------------------
 21:19:05 - Getting size of the game: The Walking Dead - Definitive Series
 21:19:05 - » Installation folder size: 45.49 GB
 21:19:05 - » Compressed game size: 41.54 GB (Ratio 91.32%)
-------------------------------------------------------------------------------------------------------------------------------------------
 21:19:05 - Overall input size: 45.49 GB
 21:19:05 - Overall output size: 41.54 GB (Ratio 91.32%)
 21:19:05 - Overall conversion time: 26:37:47
 21:19:05 - Overall conversion discs: 10 DVD5
-------------------------------------------------------------------------------------------------------------------------------------------
 21:31:17 - Merging Records.ini into the Setup.dll file.
 21:31:17 - The Records.ini file was merged into Setup.dll successfully!
-------------------------------------------------------------------------------------------------------------------------------------------

Did I do something wrong? I used the tool you told me and I checked MD5s before and after decryption to make sure the files are decrypted, and they were different so I assumed the decryption was successful.

[Masquerade]

Originally Posted by pslove

so I assumed the decryption was successful.

To assume makes an ass out of u and me

Anyways...

Make sure you used the correct key for decrypting the data. Check in hex editor that the decrypted file starts with ZCTT. ECTT will be an encrypted archive, ZCTT means you did it correctly.

Test on a single TTARCH2, decrypt and see if you can inflate it with XTool. If you decrypted it right, you will get correct ZCTT header and XTool will be able to precompress the data.