I am not much of a shooter fan, but I remember the first Soldier of Fortune having a button that made you switch hands. Alas, it was in the long gone days when FPS's were mostly PC exclusive, you had a function under every key of the keyboard and you had to type in cheats in consoles that also monitored the engine.
I feel old just typing that.
Edit: removed redundancy
I feel old just typing that.
Edit: removed redundancy