Easter eggs in Heroes.

You can play as a tank, and even as Godzilla. You just need to place them in the map editor (in an unusual way). You can't do it in official maps.

I was actually referring to the possibility of playing with them in campaigns. But using the editor doesn't count ;)

Ivan Ermakov, please remove the images from your first post. It's not very pleasant for those who are mindful of their traffic when an image loads every time. I have problems even with unlimited data when loading other windows besides this one, plus they are so large that a scrollbar appears, allowing you to move right and left. It's annoying :(