Gordon eventually winds up in a secret part of the facility where he discovers that scientists had been "collecting" specimens from Xen since long before the incident occurred. <br />Inside, Freeman continues to rearm himself to rejoin the battle against the HECU. He also meets the alien military units, the Alien Grunts; and finds one of the most powerful weapons in the facility, the Tau Cannon. Soon, he heads outside to search for the Lambda Complex.
