Issue 1: Colours are messed up.

Solution: GOG Launcher is a program that is supposed to kill explorer, I find it hardly works so just kill Explorer.exe manually and restart it after playing.

If you have your own issues or issues and workarounds feel free to add them to this thread.

Issue 2: Strafing mouse oddness

So if you hold down strafe left or strafe right and move the mouse, you stop turning but moving will ACCELERATE strafing movement, and its not the strafe enable button, very odd.

Issue 1: I was searching any fix for the colours bug & I didn't find anything, besides to kill Explorer.exe manually, what I didn't want to do. But I discovered solution myself, at least it is working for me. I just disabled the deskdop wallpaper changer! Looks like every time it changed wallpaper in the game colours got messed up. Sometimes colours are messed up when starting up, but at least now I can play it how long I want.

Issue 3: Some of cutscenes don't play in the manor with error pop up "The system cannot find a decompressor that can decompress this movie". Pressing ENTER you can continue.

Thanks for the heads up. Really wish the mouse had free-look instead of it also being for strafeing as well.