Most are simply reacting naturally to their new surroundings, but even more hostile are the creatures glimpsed earlier, known as Vortigaunts, who seem to attack with a single-minded intent to kill. Black Mesa has suffered massive structural damage, and aliens from Xen begin randomly teleporting in all around the facility. Eli requests that Gordon try to reach the surface in order to find help. He manages to reach his colleague, Eli Vance, who informs him that all communication outside Black Mesa has been lost. Waking up back in Black Mesa, Gordon makes his way out of the Test Chamber. This chapter introduces the player to weapons, combat, and environmental hazards, among other things. This chapter details Gordon's efforts to reach the surface to get help in the aftermath of the Resonance Cascade.
