Hello all,

Just to make sure that everybody saw this, Steam has created an excellent guide to fix the "green screen video bug": http://steamcommunity.com/sharedfiles/filedetails/?id=257460837

Step 5 worked for me:

Step 5: Are you running Windows 7 or 8, have an i5/i7 processor with on-board Intel HD graphics AND dedicated graphics?
You may find that despite being up-to date on all your dedicated graphics card drivers, Windows will be attempting to launch the game via the Integrated Graphics Accelerator. There are two ways to prevent this. Firstly if you are using Nvidia you can go to your Nvidia control panel and change your "preferred graphics accelerator" to your dedicated GPU. If you are running Windows 8 you can also change the launch settings of the game to ensure it is using the dedicated card to launch the game.

Obviously people are saying that this step is fixing the problem :) Gog should have created a post for this... Anyway, enjoy the game!

Just a small correction - that guide was written by Cubase (one of the game developers) and not by Steam :)
This guide should exist within one of the posts in the GOG forum as well (it originated somewhere here if I recall correctly), but yeah, Cubase should copy/paste it here and ask GOG to make it sticky.

Uh OH, my bad Cubase!

Thanks for the clarification.