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

Commander Keen coming to mobile

Joining PlayFirst is like a return to the early days of id, says Tom Hall - Polygon

NEW COMMANDER KEEN SLAYER SKINS - Cutscenes & Gameplay

History of video games - Wikipedia

Commander Keen (Nintendo Game Boy Color, 2001) for sale online

Commander Keen Resurrected as a Mobile Game - E3 2019 - IGN

Widely hated Commander Keen Mobile reboot is very likely dead

Commander Keen is back as a mobile game

Cancelled games - KeenWiki