System requirements 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 pc requirements list Half-Life: Blue Shift
Minimum: 500 mhz processor, 96mb ram, 16mb video card, Windows XP, Mouse, Keyboard, Internet Connection
Recommended: 800 mhz processor, 128mb ram, 32mb+ video card, Windows XP, Mouse, Keyboard, Internet Connection