Devs Play S01E05 from Double Fine is a DOOM gameplay session featuring John Romero, co-creator of the seminal first-person shooter (thanks Shacknews via nin). In the clip The Romero plays the game and discusses its history and the design philosophy behind some classic levels. Here's word:

Doom history enthusiast and Spacebase creator JP LeBreton joins id Software co-founder John Romero as the two play though the first episode of Doom, “Knee Deep in the Dead,” in its entirety. John Romero’s run through each level turns up fresh and encyclopedic insight into how this genre-defining title was designed and set the stage for first-person action games for years to come.

This first part introduces us to JP and his long history with Doom before taking a trip to John Romero's house to kick off the marathon play session.