Hello Blender World 
As there is no Text Debug overlay (or I could not find) to display Debug Information in Blender Game Engine from Python (except simple printf() to the console) directly On Game Screen, I have created a text object, then translated to get in front of the Camera with:
cam = cam.getCameraToWorld()
txt.localTransform = cam * 0.5
However, text object gets located in the middle of the screen in front of the camera (partial success)…
Question is how to put that text to the top left corner (or any corner) of the current camera view?
The Ultimate Question is how to produce a live Debug On Screen overlay in Blender Game no matter what Camera is selected and using no additional external resources / additions? How can I append to Debug Properties ?
Any hints appreciated! 