Black Mesa is the fan-made re-imagining of Valve Software’s Half-Life. You are Gordon Freeman, a theoretical physicist at the Black Mesa Research Facility. When a routine experiment goes horribly wrong, you must fight your way through an interdimensional alien invasion, and a bloodthirsty military clean-up crew in order to save the science team... and the world! Run. Think. Shoot. Source. This channel was generated automatically by YouTube's video discovery system.