KF2 Mouse Too Fast: KFInput.ini Sensitivity and Acceleration Cvars

If your Killing Floor 2 mouse sensitivity is ridiculously fast and the pointer feels accelerated even at the lowest slider setting, the cure is a few lines in KFInput.ini. The author warns to apply the fixes at your own risk and to make backups.

Symptoms

• Sensitivity is ridiculously fast.
• The pointer feels accelerated.

Fix

1. Go to %USERPROFILE%\Documents\My Games\KillingFloor2\KFGame\Config\.
2. Open KFInput.ini in a text editor such as Notepad or Notepad++.
3. Find and edit these cvars:

Cvar	Change
MouseSensitivity=x.xxxxxx	Set below the normal value. 25.0 corresponds to the slider at the very left (default).
bEnableMouseSmoothing=true	Set to false (turns mouse smoothing off).
ZoomedSensitivityScalar=x.xxxxxx	Set to taste. The scoped sensitivity is MouseSensitivity multiplied by this value.
bViewAccelerationEnabled=true	Set to false.
HorizontalSensitivityScale=x.xxxxxx	Set below the normal value.
VerticalSensitivityScale=x.xxxxxx	Set below the normal value.

4. Save the file and make a backup copy of the edit.

Important note

Every time you open the Options/Control Panel in game, these settings are reset. Keep your backup and restore it after visiting the menu. Another approach is making the file read-only; see mouse settings fix in KFInput.ini for related methods.

The guide was updated on 25 March 2020 to be cleaner to read.