My aiming isn't bad in GTA III/VC. I feel as though it's at a decent level. On the "Farewell, Chunky Lee Chong" mission, my crosshair was aimed directly at his body, but was every one of my bullets for some reason. Then, I did some testing and figured out that the bullets were going slightly to the right for some reason. Checked Vice City as well, and it was doing the same thing. Anyone has any idea of what may have happened? If so, how can I fix it? I'm streaming soon, but I can't with this thing going on...

Turn off Widescreen in the settings

That actually solved the problem. Thanks!