(I am duplicating the post I originally posted at http://steamcommunity.com/app/219890/discussions/0/864958451359477350/#c864960353952043724
since they seem to be different issues)
I own an ATI Radeon X1950.
The game used to crash after the Antichamber logo, the screen turned black (no video actually plays), giving an error "UDK has stopped working".
It seemed that Radeon X1xxx video card owners have issues running UDK based games according to Google searches and posts in other threads on this community hub.
However, I've done much research and found these threads:
Keywords UDK Radeon X1950 on google gives:http://forums.epicgames.com/threads/736974-quot-Game-Unreal-Development-quot-Kit-Crashes-while-loading?p=27547673&viewfull=1#post27547673
which leads to:http://forums.epicgames.com/threads/739895-help-UIScene-gt-Crash?p=27545882#post27545882
I've done what was said in the thread to "fix" the game.
In those files:
Find all instances of the word:
in the config files, and change it to:
Now, Antichamber starts with a video logo, and the game is now running (at least). I am unsure as to whether gameplay works or whether some graphical elements are missing, but at least now I'm in the game and I can move around and interact with the world.
I hope this will help other people with the same issue.
EDIT: As an additional note, before finding this fix, I have tried intalling another version of PhysX and also tried disabling multicore affinity for that process (CTRL-SHIFT-ESCAPE udk.exe > Define affinity), and they did not work. Therefore, I cannot tell if installing PhysX is or not a pre-requirement to fix the issue.