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⚠️ Warning

This guide is for players that do not have the Sinclair Solutions Deluxe DLC installed.

If you have the DLC content installed use this guide instead: SSD - Mouse Sensitivity Fix

Mouse Sensitivity Fix

This guide explains how to fix the mouse sensitivity being too fast by modifying keybinds within the "UserMP.ini" config file.

• Navigate to UserMP.ini
• Edit Keybinds
  • MouseX and MouseY
  • Disable Mouse Acceleration and Smoothing
• Change the In-Game Sensitivity
• Verify Fix

Navigate to UserMP.ini

1. Press Windows + R to open the Windows Run Dialog

2. Type %AppData% into the text box.

3. Press Enter. This will open the "AppData" folder.

4. Within the "AppData" folder, double-click the folder called "Bioshock2Steam".

5. Within the "Bioshock2Steam" folder, open the file "UserMP.ini" in any text editor.

The file should look similar to this once opened.

Edit Keybinds

MouseX and MouseY

These first few steps will have you modifying the values of 10 different keybinds within the UserMP.

1. With "UserMP.ini" open, press Ctrl + F to open the search box.

2. Type aMouseX into the text field, then press Enter. This will bring you to the first pair of keybinds, MouseX and MouseY, which should resemble this:

MouseX=IF_MOUSE_LOOK_ENABLED Count bXAxis | IF_MOUSE_LOOK_ENABLED Axis aMouseX Speed=2000.0
MouseY=IF_MOUSE_LOOK_ENABLED Count bYAxis | IF_MOUSE_LOOK_ENABLED Axis aMouseY Speed=2000.0

3. Modify both lines, replacing 2000.0 with 200.0, so that it resembles this:

MouseX=IF_MOUSE_LOOK_ENABLED Count bXAxis | IF_MOUSE_LOOK_ENABLED Axis aMouseX Speed=200.0
MouseY=IF_MOUSE_LOOK_ENABLED Count bYAxis | IF_MOUSE_LOOK_ENABLED Axis aMouseY Speed=200.0

📝 Note

Although 200.0 is recommended and most commonly used by the game's playerbase, any value can be used in place of 2000.0, depending on your preference.

5. The term aMouseX appears in five places in the file. Repeat Step 3 for the remaining four MouseX and MouseY keybind pairs, modifying both lines as above.

6. Save the file, either by pressing Ctrl + S or choosing "File > Save" from the menu bar.

Disable Mouse Acceleration and Smoothing

Now that your sensitivity values have been adjusted, let’s disable mouse acceleration and mouse smoothing to give you even greater control over your aim.

1. Press Ctrl + F to open the search box again.

2. Type Alias=MoveForward into the text field, then press Enter. This will bring you to the following line:

Aliases[1]=(Command="Axis aBaseY SpeedBase=1.0 Speed=+1200.0",Alias=MoveForward)

3. Replace this line by copying and pasting the following line in its place:

Aliases[1]=(Command="Axis aBaseY SpeedBase=1.0 Speed=+1200.0 | set PlayerInput MouseAccelThreshold 0.0 | set PlayerInput MouseSmoothingMode 0",Alias=MoveForward)

4. Save the file, either by pressing Ctrl + S or choosing "File > Save" from the menu bar.

Change the In-Game Sensitivity

1. Launch the game.

2. From the main menu, select "Options > Controls".

3. Under "Mouse Sensitivity", change the value from 3 to 1.

📝 Note

While players may choose any in-game sensitivity, 1 provides the most aim control once the fixes have been applied.

4. Press Accept to save the changes.

Verify Fix

After applying the changes to "UserMP.ini" and changing the in-game sensitivity, you should verify whether the fix was applied correctly.

1. Launch the game and create a private match.

2. Start the match. Once the match begins, use your mouse to look around and test how the sensitivity feels.

3. If the sensitivity feels too fast or too slow, repeat the steps above to adjust the sensitivity values in "UserMP.ini" or in the Options menu.

📝 Note

After modifying any files, the game must be restarted for the changes to take effect.

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