If I were a security guard at Black Mesa, my head would get crabbed within minutes of a resonance cascade. Not so for Barney Calhoun, who fought his way free of the facility back in Valve's 2001 Half-Life expansion, Blue Shift. Modding team HECU Collective have been forcing him to run that gauntlet again, so far releasing 3 chapters to their mod for Black Mesa - not the fictional company, but the very real (and good) fan remake of the original Half-Life.
Chapter 4: Captive Freight comes out tomorrow, so it's a fine time to jump in.