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PostPosted: Thu Aug 02, 2018 4:07 am 

Joined: Thu Aug 02, 2018 3:53 am
Posts: 1
Corpse Party is a fairly neat little horror game, and for a few reasons, I would like to rip some Graphics/SFX from the game.
Unfortunately, the files that seem to contain what I want are in the .BCX format, which after some googling, appears to only be used for this game.
I have absolutely no idea where to begin with this, so I would greatly appreciate some help!

(Here's one of the files https://www92.zippyshare.com/v/wrxbP7PO/file.html I'm talking about.)

P.S.
I have no experience in decrypting


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PostPosted: Thu Aug 02, 2018 6:31 am 
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Joined: Wed Jul 30, 2014 9:32 pm
Posts: 8779
It's the same encrypted DX format used in other few games apparently without the same developer in common.
I have just updated the script for implementing the key of this game:
http://aluigi.org/bms/heart_of_crown.bms

I didn't know that the game used this format, I simply found some repeated 12bytes sequences of same bytes (the "pattern") and tried to test them as xor key, found the correct one after 3 tries where a sequences of 0xaa appeared in the output file since there are no sequences of zeroes available (original bytes XOR 0xaa = key). I noticed the DX at the beginning of the file and searched it in my scripts database where indeed the format was already covered.


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