I thought Doom was developed on NextSTEP, at least wikipedia says so
https://en.wikipedia.org/wiki/Development_of_Doom
"We wrote all of DOOM and Quake's code on NeXTSTEP"
http://web.archive.org/web/20140310124554/http://rome.ro/200...
https://en.wikipedia.org/wiki/Development_of_Doom
"We wrote all of DOOM and Quake's code on NeXTSTEP"
http://web.archive.org/web/20140310124554/http://rome.ro/200...