Deathless

Deathless is a four-episode mod for DooM, famous for being made in nine days, that was developed by James Paddock and released on November 9th, 2018. Each level was made with a specific color scheme and with the overall arching theme being short-spurt levels that can each be completed within minutes. Although not officially developed, licensed, or published by id Software, it is officially supported by them. It was later released as a free add-on for 2019 remasters of The Ultimate Doom.