You can report any mistakes (even down to incorrect comma placement) - I would like to polish the map to perfection.

Let me state upfront - I am also human and can make mistakes, so everything I wrote below is not 100% accurate. If you find any errors, please correct them. I also think it is important to mention that this is not nitpicking, but rather assistance to the author in polishing the map, which he himself requested.
Here are the errors I found:
Quest "Become a Hero":
- "this will greatly worsen his chances" - you cannot worsen chances, you can only reduce them. You can worsen a situation or position.
Quest "Imperial Post":
- "halfway between Archil and Windead" - "halfway" should be written as one word.
Guide - Friendly Warning:
- "someone from among acquaintances, with a mysterious smile, said nothing and made him play" - "said nothing" should be separated by commas: "with a mysterious smile, saying nothing, made him play"
- "including the good old alchemy" - I'm not sure, but I think "good old" should be written without a hyphen.
Guide - Important Features:
- "special abilities that the hero can use and (ta-da!) chemistry" - you seem to have alchemy, not chemistry.
Guide - Role-Playing Gameplay:
- "You need to be more careful with heroes - you never know what they have in mind" - it would be better to say "You need to be more careful with heroes - you never know what they have in mind"
- "There is nothing wrong with" - here, I think it would be better to say "There is nothing wrong in doing"
- "which means accidentally selling an important quest artifact to a store, or carelessly killing a character necessary for completing the plot" - here, on the contrary, a comma is not needed: "artifact to a store or carelessly killing"
- "Of course, this does not negate" - "Of course, this does not negate"
Stable Description:
- "A place where you can" - "a place where you can". Also, the standard descriptions of buildings in the game end with a period, yours do not. This is not critical, and the amount of work to correct them is quite large, but it is noticeable.
Dialogue with Mayor Retgar, branch of questions about the first hero:
- "Galant, of course, was initially indignant" - "Galant, of course, was initially indignant"
Dialogue with Mayor Retgar, branch of questions about the second hero:
- "with the question of whether I have any work" - "with the question, whether I have any work"
Dialogue with Mayor Retgar, branch of questions about the third hero:
- "but after talking with him, I understood" - "but, after talking with him, I understood"
- "in short, not often" - "in short, not often"
- "He asked for a long time about the tears of Ashi, and was interested in whether there were any in Archil" - "He asked for a long time about the tears of Ashi and was interested in whether there were any in Archil"