When ever you download a .gcf file, you must put in your C:\(pacsteam or paccafe)\SteamApps folder.
Then go to your My Games tab in PacSteam or PacCafe which ever you have. Then attempt to install the game. The GCF file holds all the resources needed to download and install a steam game.
**Thanks for downloading.**
Half Life: Blue Shift
Made by Gearbox Software and originally released in 2001 as an add-on to Half-Life, Blue Shift is a return to the Black Mesa Research Facility in which you play as Barney Calhoun, the security guard sidekick who helped Gordon out of so many sticky situations.
Minimum: 500 mhz processor, 96mb ram, 16mb video card, Windows 2000/XP, Mouse, Keyboard, Internet Connection
Recommended: 800 mhz processor, 128mb ram, 32mb+ video card, Windows 2000/XP, Mouse, Keyboard, Internet Connection