So I've seen a number of threads on this, but none that really solve my issue.
I have this input lag, and this includes my mouse and keyboard actions.
If I move the mouse, I get like a half second delay before it responds. If I move forward, backwards, left or right with my keyboard, I get the same half second delay.
Now if I'm in the game menu, I don't get this lag at all.
I've done some previous suggestions like "Disable V-sync" in my video options, as well as turned down video settings.
I can't seem to get this to work.