The in-game slider only goes down to 10, but there are ways to get it lower than that. I've tried Cheat Engine but it's not permanent (as far as I know how to use it). I just spent an hour trying a hex editing method only to find out it doesn't accept floating point numbers (specifically 2.75).
I figure it's possible because it can apparently be changed to 2.75 via Cheat Engine. I want the best of both worlds. I'd be satisfied with a consistent Cheat Engine table rather than having to find the address each time I start Borderlands 2.
How can I permanently change my in-game mouse sensitivity to 2.75?
Update: Actually Cheat Engine can't change sensitivity to a floating point number. 2.75 autocorrects to 2.
Best Answer
Judging by the hex edit method, it's impossible to set the sensitivity to a non-whole number. The game stores the value as a byte, which means it can be a value between 0-255 (Although there's no guarantee the game will accept that full range)
To change this behaviour you would have to mod the game executable itself to use a different type of variable.