Cheat codes in Heroes 6.

Yesterday, I searched half of Google, but I still couldn't find a code to reveal the entire map. Does it even exist? Because the developers create amazing graphics and stunning mega-structures that cover half the map, which you can actually admire, but half of it remains in the fog of war, and it's impossible to properly examine them. That's not right.
But I laughed when I saw a couple of websites for the sixth game offering codes that started with nwc. Some of them added Death Knights and similar things. I thought about it a lot. I even wanted to try it, but I couldn't find out how to open the console...