Biyografi
David Speyrer is a video game designer who has been working at Valve since March 1999. He was a programmer, designer and cabal leader on Half-Life 2 and Half-Life 2: Episode Two.
David Speyrer is a video game designer who has been working at Valve since March 1999. He was a programmer, designer and cabal leader on Half-Life 2 and Half-Life 2: Episode Two.
