What happened to the Black Mesa?

Question

The Black Mesa incident is considered to be a catastrophic event due to an experiment carried out at the Black Mesa Research Facility which results in a resonance cascade and the invasion of Earth by the Combine.

Hagrid P Hazard · Accepted Answer

The Black Mesa incident is considered to be a catastrophic event due to an experiment carried out at the Black Mesa Research Facility which results in a resonance cascade and the invasion of Earth by the Combine.

What happened to the Black Mesa?

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