These projects do not start with assembly. They start with machine code interleaved with data. Even getting to assembly through a disassembled requires some input and understanding. Usually these are raw binaries with no (or limited) metadata.
replyWhen run through a disassembler, in most cases, it’s probably the first time anyone has ever looked at the assembly (assuming PlayStation or newer). There are no comments or labels or symbols. Not what most people would consider “the original assembly”.
The term "original assembly code" is sufficient enough to communicate that the binaries that are being reversed are what is disclosed to the public intentionally.
replyTheir comment still stands; whether it's machine code or "original assembly code" that shipped on the disk it falls under "clean room" reversing and by extension implementation.
Ghidra is able to figure out the functions in around 99%++ of cases though
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