Episode Two's project lead on the Half-Life series' progress.
David Speyrer was interviewed for his job at Valve on the day the original Half-Life went gold in late 1998. He started working there soon after, just as Half-Life 2 began its lengthy development. Since then, he's risen through the ranks from programmer to project lead. Now, David talks Games Radar through some of the processes that led to Half-Life 2: Episode Two being the remarkable game it is.
Warning: if you haven't played Episode Two yet, there are spoilers ahead.