When I activate mouse VSIM, the game doesn't react in the slightest to my mouse movements. I'm using win10 and according to others on the forums, it should be working fine. I tried unplugging all other input devices except my mouse and keyboard with no results. Does anyone have the slightest idea what might be causing this?

I'm encountering the same problem. The weird thing is, Mouse VSIM works in the Tutorial, but not in the DBTS campaign. I'm also running this on a Windows 10 OS.

Found a solution: I downloaded the Xtended mod (http://hazardx.com/files/filter?game=1) and the Mouse VSIM worked fine in the campaign.