Key points
General information
There are two patches available for download on the official page:
In the base game, there is no option or toggle for walking, as opposed to running in the over the shoulder camera view. A small mod addressing this is available here. The download also contains installation instructions.
Ambient Occlusion compatibility
0x0000002D (MechWarrior Online)
Ambient Occlusion usage
Enabled
Ambient Occlusion setting
witcher.exe
-dontforceminreqs
OR
<path-to-game>\Data\Override
Override
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\DirectDraw
EmulationOnly
In some cases, when the intro cinematic is skipped, the mouse is not visible on the main menu. This can be fixed by pressing the key that releases the mouse in Over the Shoulder view(Shift by default).
<path-to-game>\System\witcher.exe
Use a program such as Borderless Gaming to force the game to run in a borderless window.
<path-to-game>\system\witcher.exe
~/.steam/steam/userdata/<user-id>/20900/