Currently the peripheral action indicators
only show up for enemies. We initially had it popping up for both and we found it really annoying, and actually unrealistic. I think some people here have a misconception about what the peripheral action indicators indicate. Some of you are envisioning that it represents only the extreme edges of your real world peripheral vision. This is not how it works. It represents an
entire 100 degrees of your real world vision. In-game standard FOV is about 80 degrees on a widescreen monitor and real world FOV is about 180 degrees thus 180-80= 100, the 100 degrees that you don't see on the screen.
So try a little experiment here. Stick you arms out in front of the screen in front of you and grab the left side of the screen with your left hand, and the right sides of your screen with your right hand (this gets your head at a fixed distance from the screen). Now while keeping your head centered in front of your monitor at this distance, see how many things you can spot on your desk without turning your head, or turning your eyes. If you are like me (with a lot of junk on your desk) you probably see a coke can, a set of headphones, a couple of CDs or DVDs, some computer speakers, and more. All of this stuff you see outside the edge of your computer monitor is the 100 degrees of FOV our peripheral action indicator represents. If I can see a coke can outside the edge of the computer screen, I sure as heck should see an enemy just outside of the 80 degrees of FOV represented by the computer monitor.
And as we've previously mentioned, the indicators are smaller and almost unnoticeable if an enemy is far away. So you actually have to be paying close attention to your ACTUAL peripheral vision to notice the peripheral indicators. If that is not realistic, I don't know what is