Doctor Stanley Rosenberg is a character in the Half-Life computer game series. He is an employee of the Black Mesa Research Facility, assigned to advanced physics research in the Anomalous Materials Laboratory and Lambda Sector. Dr. Rosenberg can be also seen in Half-Life: Decay with Doctor Richard Keller at his side. Dr. Rosenberg's rank is unknown, but he has the highest level of security clearance, and judging by his habit of automatically issuing instructions to other advanced researchers, it would appear that he is a very senior member of the Science Team. In Half-Life: Blue Shift, Barney Calhoun helped Dr. Rosenberg and two of his colleagues escape from Black Mesa. He is also the designer of the anti-mass spectrometer.