The Great Black Mesa Incident

The Black Mesa Incident The Black Mesa Incident was a two-day crisis that began at the Black Mesa Research Facility (BMRF) in Catron County, New Mexico, before escalating into a major regional disaster. Initially confined to the facility, the outbreak quickly overwhelmed containment. By the end of Day 1, it spread into the City of Black Mesa and nearby areas. By Day 2, incursions were reported across the Southwest, including New Mexico, Arizona, Texas, and northern Mexico. Day 1: The Outbreak The crisis began when anomalous events at BMRF released hostile fauna and phenomena from the border world Xen. Federal Protective Forces, the Tactical Response Force, and the Office of Fire and Medical Services responded first. Despite efforts, the outbreak grew beyond control. By midday, the New Mexico Army National Guard secured the city, joined by the 1st Marine Hazardous Combat Unit (HECU). Civilians were evacuated to schools, hotels, and municipal buildings, while Guardsmen and Marines established billets across the city. Alien life pushed into streets, causing intense close-quarters fighting. Day 2: Regional Spread The crisis expanded beyond Catron County. Breaches triggered incursions across New Mexico, southern Arizona, Texas, and Mexico’s borderlands. Airfields and highways became staging areas for reinforcements, with close air support from AH-1W Cobras, AV-8B Harriers, and F/A-18B Hornets, alongside rapid-deployment infantry. A German Air Force training squadron from Holloman Air Force Base flew joint missions with the U.S. Air Force, reflecting the crisis’s scale and international coordination. BIG credits to A_Generic_Meme on Reddit for his alt history HL1 scenario, where the HECU allies, and along with the rest of Black Mesa, are more realistic. Big influence from his story and visuals for the factions. Check out his stuff here: https://www.reddit.com/user/a_generic_meme/ Once again, thanks to a_generic_meme for this cool alt HL1 scenario. Gib feedback.