SiN Episodes In some places, due to bugs in the game, you may not be able to continue. Save your game, press ~ to open the console (enable it if needed from the options panel) and type the following command : ai_norebuildgraph 0 Now, you can load the game you have just saved and everything should be fun. Some video cards have problems rendering the green smoke created by the mutagen gas, usually the screen is black while the player is surrounded by gas. A solution to this is falling back to DirectX 7 by starting the game with the -dxlevel 70 parameter in the command line. Create a shortcut pointing to the game executable and add the command at the end: SinEpisodes.exe -dxlevel 70 You could also try -dxlevel 80 which will set the game to run with DirectX 8.0 but this has not been tested.