Originally released version of the source code? about derclou

[myself600]

On the page you linked, every single file has been archived, except for those 4 related to the source code. I only found vcosta's v2.6 modified code and data files. The clou2 website mentions source code downloads in the hundreds of thousands, so someone has to have it. If I were you, I'd ask around (sourceforge, scummvm) and would try to track down and contact the original developers of the game, or Rockstar Vienna who hosted neo.at.

[myself600]

Here's the source code for the base and intro packages: https://sourceforge.net/projects/cloureboot/files/Original%20Game%20Files/Source%20Files/

[ChristianKaeser]

Great find!

Although it looks like in that version the files CLOU_SRC_BASE/CODE/LIVING/BOB.c and .h are completely zero-ed out as well (so looks like the corruption did not just happen to my old local version).
Now I wonder how those files were reconstructed in the modern ports. Presumably either via reverse engineering, or more likely one of the original developers provided them separately later on.

[myself600]

COSP changelog says it used code from intro/scroll.c for living/bob.c. Holarse has a mirror, but they're the same files. Antares Design had the full source at some point amongst others.