How to Disable Mouse Acceleration in Killing Floor 3

Killing Floor 3 is getting roasted at the moment as it's nothing like the games that came before it, but if you are enjoying it, though can't stand Mouse acceleration. This article will show you how to disable the feature. For whatever reason, it isn't available by default in the game, so we'll be modifying the game’s configuration files.

How to Disable Mouse Acceleration in Killing Floor 3

Mouse acceleration is a setting where the speed of your mouse movement affects the distance your cursor travels. In other words, the faster you move your mouse, the farther it moves on screen, even if you move it the same physical distance.

This can be helpful for general computer use, but in first-person shooter (FPS) games like Killing Floor 3, it reduces aiming precision. Most people prefer to disable mouse acceleration so that every inch of mouse movement results in a consistent, predictable amount of in-game movement, regardless of how fast you move your hand. Disabling it makes sure that your muscle memory stays reliable, which is especially important in competitive or fast-paced games.

To disable it, work your way through the following steps:

• Press Windows Key + R to open the Run window.
• Type: %localappdata% and press Enter.
• In the folder that opens, find and open the Nightfall folder. (You can type “Night” in the search bar to find it quickly.)
• Then go to:

Create a New Input Configuration File

• Inside the WindowsClient folder, you will see a file named GameUserSettings.ini.
• Right-click in the folder and select New > Text Document.
• Name the new file exactly:

• Make sure the file extension is .ini and not .txt. If a prompt appears about changing the file extension, click Yes.
• Open input.ini using a text editor such as Notepad.
• Paste the following lines into the file:

• Save the file and close the text editor.

Make the File Read-Only

• Right-click on input.ini and select Properties.
• At the bottom, check the Read-only box.
• Click Apply, then OK.

This will prevent the file from being overwritten when you launch the game.

Still Not Working? Troubleshooting Steps

If the changes don’t take effect immediately, try restarting your PC or verifying the game files through your game client to ensure nothing is missing or corrupted, but make sure you re-check the file afterwards, as verification may remove custom changes.

• If input.ini is not being recognised by the game, make sure that Windows isn’t hiding file extensions and that the file isn’t actually named input.ini.txt by mistake.
• You can test if mouse acceleration has been disabled by doing slow and fast swipes in-game and checking if the distance your aim moves is the same in both cases.