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PostPosted: Fri Oct 16, 2020 10:32 pm 

Joined: Sun Jan 13, 2019 11:45 pm
Posts: 107
Hi all.

Recently I delved into the world of Pachislot as it's often overlooked because of how much money is spent on it by game studios to make it look fancy and attractive for customers. I looked at the internal workings of the Ace Attorney Pachislot game, not pachinko.

This game seems to use .obb files which is what seems to be used if games exceed 100mb so instead of .APK, .OBB is used. Upon closer inspection on HxD, it seems to be in actuality .CPK which is criware. This is also makes it seem like it's the android version? Not entirely sure on this?

I have tried Aluigi's .CPK script and a few other tools such as Cpk-Browser, CriPakGUI with no luck.

Samples below for analyse.

main.8.net.commseed.gs.obb: http://www.mediafire.com/file/lw0944y09 ... s.obb/file
patch.8.net.commseed.gs.obb: http://www.mediafire.com/file/bbmjffgdi ... s.obb/file

Any help for research appreciated

PostPosted: Wed Jan 13, 2021 12:42 pm 

Joined: Tue Jan 12, 2021 11:08 am
Posts: 1
I managed to extract the .obb files (they are actually .cpk files obviously) using VGMToolBox and got some .png files.
But there are some files that I cannot find the formats of because the signatures are not there when I checked with a hex editor.

I think they are encrypted or something, is there a way to find the decryption key?

Samples (they are .bin): https://mega.nz/folder/STIzXArK#kBCFrIJyeqD4Oz7DQKU-HQ

PostPosted: Sat Jan 23, 2021 7:20 am 

Joined: Sat Jan 23, 2021 7:16 am
Posts: 1
I got this far as well with VGMToolBox. I have also tried using quickbms and got a bunch of Null files. Hoping someone has an answer to a way to decrypt these if possible.

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