First off, nice game..
Secondly, here is the problem.
Regardless of weapon, there is a constant tilting downward movement which is on the extreme side of annoying. I have to constantly move the mouse along the view up axis to keep the view where I want it.
It is like someone placed a heavy sack of potatoes on the end of the barrel pulling the barrel downard..
A fix or explanation would be appreciated, Sawacs