I was thinking about the plot of opposing force and I realized that it's a bit weird how Black Mesa was destroyed by a nuclear bomb. A lot of the facility is deep underground, where it can be possible to survive a direct nuclear blast. How much of it could really be destroyed? Could some scientists hiding deep within the facility have survived? If the goal was to kill witnesses, I think more witnesses would've died from radiation poisoning and possibly things like electricity going out than the b...

I mean yeah we got more enemies and weapons but I feel that Gearbox didn't fully understand Valve's game design there. Especially in Foxtrot Uniform and how some chapters seems to be copied from HL.

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Also male black ops. Why did not they meet those?

When you encounter the final Guard before fighting the Gene Worm he says "some of your buddies went down there and i haven't seen them since" Does this mean in these final moments of Black Mesa the remaining HECU forces actually allied themselves with the Black Mesa staff?...