Sigil II, a brand-new unofficial 6th episode for Doom by John Romero, coming December 10th

On December 10th, the Doom franchise will be celebrating its 30th anniversary, marking its debut all the way back in 1993 with the first game, and to celebrate the occasion, John Romero, one of the legendary developers for the original Doom and Doom II, has been working on a follow-up sequel for

SIGIL - Unofficial 5th Episode for Original DOOM by John Romero, [H]ard

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DOOM Turns 30, John Romero Releases SIGIL II

DOOM co-creator John Romero releases new Sigil II campaign for 30th anniversary – Destructoid

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John Romero celebrates Doom turning 30 with game's sixth episode, livestream event with John Carmack

Unofficial Sixth 'Doom' Episode 'SIGIL II' Now Available for Free From John Romero - Bloody Disgusting

DOOM Turns 30, John Romero Releases SIGIL II

Nods to Mods Interviews SIGIL's John Romero