GMan voice acting?

HL2 has a much increased sound quality and I guess the voice actor refined Gman’s voice for HL2 anyway.

My thoughts exactly!

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.