that one guy Aug 20 @ 2:55am
Possible fix for flashing screen and other graphics problems
If you have an intergrated graphics card your computer may have decided to set that as its default.

To change this go to C:\Program Files (x86)\Steam\SteamApps\common\Anna
then right click the "Anna.exe" icon and select "Run with graphics processor" then pick the card you wish to use.

I hope this helped!