This guide will help you with the annoying mouse acceleration, so you can enjoy New Vegas without having to deal with it.
Fallout: New Vegas How to Turn Off Mouse Acceleration
Now someone else may have already made a guide on this, but I wanted to post it here just in case.
So recently, I started playing New Vegas, and the mouse acceleration really got to me, so I found a way to fix it.
How to Fix Mouse Acceleration
Go to your New Vegas install directory (this varies, but the default location is in the steamapps\common folder), and find Fallout_default.ini. Open it using notepad, and scroll down to the section titled [Controls].
There, paste the following:
- fForegroundMouseAccelBase=0
- fForegroundMouseAccelTop=0
- fForegroundMouseBase=0
- fForegroundMouseMult=0
Then, just open the game and enjoy.