id games were some of the best of its time, containing a good mastery of technical and fun gameplay elements.
I´ve made a nice Android app with all the older .plan files documenting John Carmack´s insights on the development of Doom and Quake: https://play.google.com/store/apps/details?id=com.vitoralmei....
It looks cool but I don't understand why this needs to be an app. I'd have guessed 'offline reading' as a bonus but it needs network permissions so...?