Black Mesa Incident

What you thought was just going to be your average boring shift at the black mesa research facility, takes a turn for the worst. An experiment in the Anomalous Material Lab goes awry and results in a resonance cascade, causing catastrophic damages to the facility and the appearance of extremly hostiles aliens. Traped inside the failling facility, you will have to struggle for your survival if you wan't to get out of this nightmare alive. (there is only a security guard rout that is aveable for now, maybe I will do a scientit or a HECU marine one later. I offer my apologies for any grammars or formulating mistake in my sentences, english isn't my native language. This is my second atempt at publishing a scenario, so feedbacks are always apreciated)