Originally Posted by MusicallyInspired
Mike Shapiro is the voice actor for both Barney and the GMan in the Half-Life series. So unless his name is in the credits, no...
He sounds more like Abe from S&M.
He IS Abe. Roger Jackson is also Satan (S&M2), General Skunkapé, Mojo Jojo from Powerpuff Girls, and Ghostface from scream.