A Half-Life fan recreation following the Lambda Core chapter. Gordon Freeman, scientist at the Black Mesa Research Facility, places a sample into an electromagnetic instrument — triggering a resonance cascade that tears a rift to the alien dimension Xen and brings its creatures pouring through. Freeman survives, finds other survivors, and works his way to the surface — only to discover the facility is being sanitized of all life by armed forces. The only way to stop the invasion is to cross into Xen himself and destroy whatever is holding the portal open.