I fumbled around with the decompression of the Z66 files. It seems to be either some kind of LZ(W)- or RLE-based-compression. The first 4 bytes are the size of the decompressed data, after this the compressed data follows as bitstream where the bits are read bytewise from MSB to LSB. For now I found...

Hmm, I guess the authors of the two tools just copied the disassembled assembly and didn't reverse engineer it, so the exact workings of the (de)compression are still unknown. At least the exisiting tools "satisfy the customer" , and I have more time to figure out the decompression.

No, I'm not that fast
Maybe over the weekend.

Are you sure? In xrCore.dll there's an exported funtion called CLocatorAPI::ProcessArchive that opens an archive. It also uses the structure you described with the two DWORDs. If the MSB in the second DWORD of the archive directory is set, it's compressed and a LZ-based decompression function is cal...

The files are compressed, like almost all files from these BIG files.
I don't know the compression method uses but suspect it could be the "default" Westwood compression (usually called something like codec80).

LHA archives have different compression methods, usually newer LHA versions were backwards-compatible. Probably the game itself doesn't support a newer method. Iirc you can display the compression method used when using LHA to list the archive contents. Maybe the methods from the original archive an...

You can try my really old extractor from http://gamefileformats.netfirms.com/files/microprose/hag.zip It has a bug, though, you need to create a subdirectory called "x" in the path from where the program is called. All files will be extracted into this "x" directory and not the directory specified a...

@Rheini:

I'd also be interested in how the encryption works. I toyed around with the two command line tools but when I read you had a working decryptor I stopped.

The file seems to be zlib compressed, I didn't check it, though.

But delphi and all the programmign languages allready compress(and normally encrypt) there exe files anyways. Have you used this on a file before and its made a difference? Actually I don't know of any programming language that does this by itself. Usually these steps have to be added manually so t...

The VOX and AUD files are Speex and Ogg Vorbis files with a special header, just like in Bone and other Telltale games.

Even with a Spr builder they could just unpack the Spr and create a new one like you did

Yes, it uses the normal zlib library.