Thank you so much for your reply.
I still have some unknowns with my first question. I have added hide_description=_("This achievement is secret. The more you play, the more likely you are to unlock it!") and it works as advertised. However, there is still the issue of the TITLE showing as ??? I want the Title to show Secret Achievement when locked. There doesn't appear to be a variable for that and I still don't understand where that ??? is originally generated. The hidden = True/False affects both values.
Using your TIP of Shift+I was new to me, so thanks for that.
Using that I see that bit of text is achievement_label_text
I then find:
style achievement_label_text:
size 40 color "#ff8335"
But where is the ??? coming from? I tried adding a text parameter, but it was not the correct syntax. And even if I changed it there with proper syntax, how would I have another achievement with a hidden title of Bonus achievement and not Secret achievement?
Sorry for all the noob questions.