Inverse Mouse-Y (Fear the Wolves)

Who used to play with invert mouse solution is:

Go down the path of %LOCALAPPDATA% \FearTheWolves\Saved\Config \WindowsNoEditor\
Open Input.ini

Add two lines at the top of the file right after the [/Script/FearTheWolves.TLSCustomInputSettings]

AxisConfig=(AxisKeyName=MouseX, AxisProperties=(DeadZone=0.000000, Sensitivity=0.040172, Exponent=1.000000,bInvert=False))
AxisConfig=(AxisKeyName=MouseY, AxisProperties=(DeadZone=0.000000, Sensitivity=0.040172, Exponent=1.000000,bInvert=True))

Remove the spaces where bold.
It should look like this:Custom sensitivity for themselves.