Basically, someone could make a player type that acts like Call of Duty.
Some events could be:
-Sprint key
-Climb up/over reachable walls
-Shows when you are damaged, and it will say 'You are Hurt. Take Cover.'
-Grenade Danger Indicator. Detects nearby grenades.
-Stand, Crouch and Prone abilities (although, you can just sit to crouch and crawl to go Prone)
That's pretty much it. If someone could make this, that would be awesome.