I was well ****** off to learn that after updating to Windows 11, it essentially broke the Mother VR mod with the Steam version of the game! Took some digging but I found a relatively easy fix for anyone interested. These are my notes but the meat of it was on an obscure github page....
There's nothing wrong with the game's exe or anything, it's something to do with the install path and Windows 11. Follow these steps to fix it (these pathways are for my specific PC so tailor to your install locations)...
- Go to Steam\SteamApps\common and move (cut & paste) the "Alien Isolation" folder to somewhere outside of Steam
I went with G:\Games as that's the same drive I have Steam on.
- Rename the "Alien Isolation" folder to "AlienIsolation" (no spaces!!!)
- Delete the Steam\SteamApps\common\Alien Isolation folder if it still exists
- Open a cmd command prompt as Admin and enter this principle:
mklink /d "Path To Steam Alien Isolation Folder" "Path To New Location"
i.e. for me it's SPECIFICALLY: mklink /d "G:\Games\Steam\SteamApps\common\Alien Isolation" "G:\Games\AlienIsolation"
This creates a "SYMBOLIC LINK" between the 2 directories. From Steam's point of view, the game is still installed in "...Steam\SteamApps\common\Alien Isolation" because Steam requires it to be at that path to launch the game.
THAT'S IT. WORKS!