In this episode I talk to Sandy Petersen, a member of the Id team who  created most of the levels with episodes two and three of Doom, and  creator of 17 levels for Doom 2 and 7 of the maps for Quake. He's also  worked on Civilization and as a lead designer for the Age of Empires  series.  

We talk about the level design philosophy behind episodes two and three  of Doom, the various dramas at Id Software, the trouble with balancing  Age of Empires, and a Halo MMO that never was.