订阅以下载
S4: Barney

Replaces the GUARDS, not the MTF. If I made a sequel, the HECU would replace the MTF, and the Black Ops would replace the CI, so that's why.

Hey, Gordon! It's me, your pal Barney, from Black Mesa! Sorry for the scare, I had to put on a show for the cameras. I've been working undercover with the foundation personnel for years! Now, I can't take too long, or they'll get suspicious. I'm way behind on my class-d killing quota. Now get in the test chamber before you blow my cover!