The Great Wall is not a known NES game title. However, if you are referring to the game "The Great Waldo Search," it is a puzzle video game released in 1991 by THQ. The objective of the game is to find Waldo (a character hidden within a crowded image) within a set time limit.
If there is another game named "The Great Wall" that I am unaware of, please provide more details, and I will do my best to assist you.
