You can freely rotate the camera in 360 degrees by checking the option in the games control panel.
It warns you that it was made more for player created modules and that you may see graphic artifacts as the main campaign was not designed for you to rotate the screen 360 degrees
I use it on the main campaign as the game is FAR too frustrating when I can only rotate my view a slight bit that the game allows when we don't turn on that feature. Many times I feel like I'm missing seeing stuff on the ground hidden behind objects or walls even though they designed the game not to place objects in areas that we'd not be able to see.
Anyway, you can rotate 360 degrees although we can't change the tilt as freely or at all for that matter.
