Source Game Problem: Screen goes black in the Direct Intervention chapter of Half-Life 2: Episode One

http://support.steampowered.com/cgi-bin/steampowered.cfg/php/enduser/std_adp.php?p_faqid=475

This issue is caused by color correction settings obscuring the colors in the map - even if you try to light up the area with the flashlight or gravity gun, all that will be visible on the screen will be the crosshairs.

Please follow the instructions below to correct this issue:

1. Launch Half-Life 2: Episode One through Steam
2. From the main menu select Options
3. In the Video window click the Advanced button
4. Use the drop down menu for Color Correction to turn color correction Off
5. Save the settings and reload your game from the last auto-save