David Speyrer - is a video game programmer. David Speyrer began his career in 2004 and has worked for companies such as Valve Software, NVIDIA Lightspeed Studios and Valve. David Speyrer's first game was Counter-Strike: Source which was released 20 years ago. Best Game David Speyrer contributed to was Half-Life 2. David Speyrer's latest work is Half-Life: Alyx which was released 4 years ago.