Half-Life: Blue Shift (2001)

Half-Life: Blue Shift is an expansion pack for Half-Life developed by Gearbox Software and Valve Corporation. It was released in North America on June 12, 2001.

Special thanks to:

 * Jon St. John - Dr. Rosenberg, Harold, HECU Soldiers
 * Kathy Levin - Black Mesa Transit System Announcer
 * Harry S. Robins
 * Mike Shapiro