QuakeUnity.com — Inside id Software, by Roger Lamarca

"When first entering the two story office building where id Software is currently headquartered... you are greeted by a huge DOOM logo, multiple pinball machines, and lots of awards blanketing the walls. Right behind id's secretary, Donna Jackson, you will find a room holding a original DOOM figure sculpted by id years ago. The id trophy shelf also located in the lobby, consists of various game boxes and awards id has won over the years."

PC Mania — Quake II: Creación de las Mapas con Radiant

"Ahora que el panorama de los editores para Quake II se ha aclarado un poco, es el momento de la comenzar a estudiar la construccion de mapas para este juego. Asi, comenzaremos a estudiar los principios basicos en los que se basa la creacion de mapas para Quake II y el sistema de trabajo del editor Radiant, creado por Robert A. Duffy."