Realistic graphics are cool? Yes.
Wonderful light effects are cool? Yes.
Machine guns, pistols, grenades are cool? Yes.
Super powers are cool? Yes.
But that's not all we want. That's not enough, or may not be necessary for fun.
We do not want to play an interactive movie!
What we want is a free play and have fun.
Doing what we cannot do in our real life.
Breaking rules that cannot be broken in reality.
-> We do not want linearity!
We want to run, swim, jump, shoot down enemies with bullets in the legs.
We want to see everything can be broken.
We want to break into the enemy base by behind.
We want to flee. We want time to relax.
We want to drive, want to travel.
We want some collectible stuff or editable stuff.
We want to be unique to stand out. We want to jump off planes more than 1 time.
We want to see we are hurting the enemy. We want to see enemies reeling.
We want some "enemies" to help us for some time.
We want to find secret places. We want to solve small puzzles.
A war is not only action. War is dominated by intelligence.