6424 Heroes. Chinese map completed. Next – description and spoilers. If you want to play it yourself, don't read it! :)
I'm a little confused that a cheat was used because the computer ran away and didn't open its quest marker. This could have been a bug, or some additional puzzle from the author.
The idea is fresh; in Metatasker, you could complete 2/3 of the map to find out that the map is unpassable due to an unkillable enemy hero on level 111. But I don't approve of such sadistic behavior from mapmakers, so I'm a little confused. When I imagine that I wouldn't know about a completely obvious battle in the Rampart, and after a couple of months of real time, I would realize its impassability, I get goosebumps and stable associations with the movie Saw; the final soundtrack from it fits perfectly with such a situation.