Does this apply to examples where the author may or may not want to be known, but the corporate policy of their employer forces them to use a pseudonym, anonymous authorship, or otherwise uncredited? This was common in the 1970s and 1980s game industries in certain regions. Such examples are typically proved through Easter eggs, or claims supported by workers who are known to have worked on a project.
Topic on Talk:Anonymous Author
As long as the author of a work isn't credited, I think this could count
Thanks! I went ahead and added some examples of this to the page.