How many headshots have you delivered in every game you've ever played.

[ameratsu]

I have no idea, but I do have a couple stats

in Left 4 Dead (yay stat tracking): 1542
in Metal Gear Solid 4: At least 100 (I got the award for 100 headshots in a playthrough)

So 1642 for sure. Maybe~25k given how much counter strike and tribes I used to play.