Non-Level5 SSZL

[EclipsePrism]

Hello,
I have obtained some SSZL file from the developers Syn Sophia, the ones behind the Style Savvy series.
However, they do not appear compatible with the SSZL decompressor, since IsMatch returns false.
I have attached some files which should contain DirectX 9 textures.
Is there anything that could be done about it? I am pretty clueless when it comes to compression algorithms.

Textures.zip

I can provide more/different types of files if needed.

I understand if there is nothing that can be done/there is no interest in this.

[Venomalia]

The files are definitely different from those of Level5.
Are the dates from a 3ds game and do you know by any chance what the beginning of the decompressed file is?

[EclipsePrism]

Hello,
The files are from an arcade game that has recently come into my possession (as in, the actual cabinet itself), not a 3DS game, so it is a PC DirectX 9 game from 2014. I do not know the beginning of any of the files, but I do have smaller files if that would help? I know what an equivalent file is supposed to contain in Unity, as this game received a Switch port, and there is a model that is just a cube with no other information so it is very small.

[EclipsePrism]

I can also tell that the arcade itself ran on Windows XP if that helps any (meaning CPU capabilities weren't the best)

[Venomalia]

Ah ok, that makes sense.
Maybe you can give me the smallest file you can find?

[EclipsePrism]

Alright, this is as far as I am aware the smallest kind of file, which is supposed to be a 3d model of literally just a cube/rectangle so it has only 8 vertices

cube.zip

[Venomalia]

It helps, I think hex 0x8-0xb is the decompressed size, the compression block probably starts at hex 0x14 and always starts with 0xBD, 0x18 which doesn't tell me anything?
It is possible that the data uses xors to make reading more difficult.

[Venomalia]

maybe it is Zlib with Xor if that is true we need to find the key.

[EclipsePrism]

Ah, that would make things much harder... See, I am very new to reverse engineering this kind of thing, so I have a friend helping me (i only have experience modding in Unity and parsing basic binary data). I got the SSD dumped, but if the key would be anywhere it would be in the game executable which... is encrypted/somehow obfuscated, presumably by the arcade's I/O Board. I want to try obtaining that, but my friend is very busy for the foreseeable future, and until then it can not be loaded in things like Ghidra etc. (Sidenote, for easier contacting that I am more likely to see faster and can more easily "ramble" about things in, my Discord is @ eclipsenebula )

[Venomalia]

It is not a simple xor with a key from 0-255 and Zlib or GZip, It can also be something much more difficult like AES Encryption.

I don't think there's much I can do for now.

[EclipsePrism]

I see, that is a shame but I appreciate the effort you put in on my behalf.
My long-term plan is to get a decrypted version of the executable and learning Ghidra, so if I manage to figure out how this compression works through reverse engineering the game code, I will update and let know.