any hint

I've heard this game is quite hard and I was considering playing it with a controller on TV just for the atmosphere.

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While playing the game it feels really sluggish, it's difficult to describe. My performance seems to be fine (200+ fps) but whenever I move the camera around it feels really choppy. Turning the vsync on helps a bit but it still gives me a headache...anyone having similar issues?...

I play on normal difficulty and i barely have enough handgun or m4 ammo, enemies drop between 10 and 5 bullets so not even enough to kill another one sometimes. Any code i can use in the in-game console to display some ? Thanks in advance ...