My friend and I got the Zombies and Demons mod off the workshop and he made a mission with the mod and we were about to play. He had a lot of lag and left the game to restart to try and fix the lag. When he logged on to his computer the screen resolution was really zoomed in and when he tried to change the resolution it would not let him. A message poped up saying "No AMD Graphics Card Driver found" or something and when he goes into the advanced settings it does not display him having a graphics card. He unsubscribed from the mod but it is still messed up.