These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Delta Green
Magnificent Bastard: Stephen Alzis. Appropriate, considering he may or may not be an avatar of Nyarlathotep.
He also is the sole important NPC without a stat block, because, as the description says, "Stephen Alzis is many things. Vulnerable is not one of them."