Half Life: Black Mesa SP Map

no other creature to reproduce the creatures to spread terror. Gorden has to fight his way past old monsters and through obstacles to get to deeper parts of blackmesa. After been bagged and left for dead by the army in a dead office with no where to go, Gorden has to try to escape and seek his revenge on the army for leaving him for dead.
After Gorden freeman defeated the nihilanth; he returned to black mesa to find any survivors before the trip home. After the nihilanth was slain, few creatures of it's creation lived since there was