Please Blender! Add rotation in Walk Mode Navigation!

Idea: Instead of Blender making the WASD keys and arrow keys be the same movement (i.e moving you left, right, forward and back) the arrow keys should rotate you.

I have a project that I'm having a friend play around in. I want a friend to play so I can get a realistic reaction from the gameplay instead of me hand-animating it and it being scripted. (It would really ruin the whole purpose of the project if I hand animated and scripted it.) I'm trying to replicate 'Tank Controls' from old video games. (i.e turning head/view up, down, left and right)

As of now, in Blender, WASD and arrow keys make you move. I would like the arrow keys to rotate, making it look like moving your head to the left, right, up and down. You will be able to change the keys in preferences though if you use the arrow keys to move.

But please don't get rid of the mouse function!!! The mouse function is awesome, I love it, I just want to also move my view to rotate using the arrow keys too.

PLEASE BLENDER! Do this please! I really need it for a project!