Half-Life: Blue Shift
Half-Life: Blue Shift is an expansion pack for the game Half-Life. It was made by Gearbox Software with Valve and published by Sierra Entertainment. Blue Shift was the second expansion for Half-Life, originally intended as part of a port of Half-Life. Although the port was cancelled, the Windows version was published as a standalone product in 2001 for Windows. It was published on Steam on August 24, 2005.