Commander Keen and Doom developer joins casual mobile company PlayFirst - Polygon

Widely hated Commander Keen Mobile reboot is very likely dead

Commander Keen Mobile Reboot - Page 2 - Public Commander Keen Forum

New Commander Keen Android game is coming, but one of Keen's original creators is skeptical - Android Authority

David A Palmer Productions Games - IGN

Retro gamer №127 by Michel França - Issuu

How To Play Video Games, PDF, Social Science

News - January, 2014

E3 @ 2019 - Commander Keen Announced during Bethesda's Conference

Commander Keen' Getting a Modern Remake for iOS, Android

Nobody is Happy About Commander Keen Returning As A Mobile Game

NEW COMMANDER KEEN SLAYER SKINS - Cutscenes & Gameplay

History of video games - Wikipedia

Commander Keen is back as a mobile game