Interview with Sergeant Mark IV (Hell on Earth Starter Pack + Doom 4 Weapons ) - VGP : r/Doom
Sgt Mark IV's Brutal Doom is Actually Brilliant - YouTube
Not sure if this is good or bad (Sgt Mark Patreon in question) - Page 3 - Doom General - Doomworld
Brutal Doom - The Doom Wiki at DoomWiki.org
Sergeant Mark IV's death messenger mod for Doom - Mod DB
Sergeant Mark IV Banned blog - TheUnbeholden - Mod DB
WH30K - Imperial Fists Tactical Vet Sgt (Mk IV) by HammerTheTank on DeviantArt
Sergeant Mark IV | Rock Paper Shotgun
Sergeant Mark IV is working on a Vietnam war inspired "Doom II" mod called "VietDoom" : r/Doom
In The Keep Podcast - #55 Sgt_Mark_IV (Brutal Doom)
Sergeant Mark IV | The King of Grabs
Sergeant Mark IV has released Brutal Doom v20 - TGG
to be fair, SGTMarkIV did have some solid points when he explained why he wouldn't be playing doom eternal, but it essentially boils down to “new game bad, old game good” :
NO SUBTITLES) Sgt Mark IV will continue Brutal Wolfenstein's development and other Facínora News - YouTube