Using 2.0.3 I've tried enabling/disabling different input methods to no avail. I set it up the same way I did for the Doom games and they work fine. The only thing the mouse does is look up and down. I've also tried adjusting the sensitivity but that did nothing. I have an i3 3.2Ghz, 6gb ram, Win7, Radeon rx550 4Gb. The games run fine.