Barney

Barney is the main security guard in Black Mesa.

Overview
Barney is a security guard at Black Mesa who is friends with Gordon Freeman. He was been at his job for quite a while until the Black Mesa Incident happened. Barney helped the Science Team and Gordon throughout their adventure, eventually leaving before Gordon does and before the nuking of Black Mesa. When he returned and found out everyone was okay, he helped in the reconstruction of Black Mesa. It is also known that Barney is very interested in aliens. He also owes Gordon a beer.