Left4Dead2 Visuals Multihack

or i have this idea, can you add icons on the screen such as arrows or triangles to indicate where the zombies are around you when they are not visible cuz when you dont point toward them, for example when they're behind you, especially the SI, this is helpful for to know exactly where they are for you to deal. I really hate being caught by them all of a sudden in the back

Theres a radar