Black Mesa: Blue Shift releases its fourth chapter

Half-Life: Blue Shift was a 2001 spin-off developed by Gearbox that put players into the regulation boots of Barney Calhoun, a security guard at the Black Mesa Research Facility and friend of Gordon Freeman. Following the original Half-Life's modder-made remake as Black Mesa, another group of modders set to work remaking Blue Shift using Black Mesa's resources...
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