12: Missing comma?
On page 12, in the section with wide paragraphs at the top, in the 3rd wide paragraph, last sentence, it reads
... also called the DM Dungeon Master, ...
I believe there should be a command between DM and Dungeon Master.
... also called the DM, Dungeon Master, ...
Also, I noticed this style in some section headings, like "RDME Rich Decision Making Environment" on page 21. In headings, I think there should be a colon, but in sentences like on page 12, a comma.
Another way is Abbreviate The Phrase (ATP).
Recommend this be looked at throughout the document, but it's not a show-stopper.