Macabre Conversions was a level editing team that consisted of David "Merciless Madman" Biermann, David "Blackplague202" Taylor, Ty "Ttwylerr" Towell, and Joe "Poisonous Ink" Zook. Macabre Conversions was active from mid-2013 to late 2017.
The team's first project, Operation: Reckoning, was created for Duke Nukem 3D: Atomic Edition and was the only mod that all four team members were involved with; the mod started development on June 20, 2013, was finished on March 20, 2015, and contained 35 single player-only levels, weapon strength modifications, and new voice-overs. The second mod, Davepack, was created for Doom II: Hell on Earth; it started development on July 13, 2013, initially finished development on October 1, 2013, and contained 50 levels designed by David Biermann (he fixed a glitch in the updated release that was found by Ty Towell in the original version). The last two projects by Macabre Conversions were Wrath and Twisted, which were a 36 level megawad for The Ultimate Doom and a 45 level megawad for Heretic: Shadow of the Serpent Riders, respectively. Wrath, which had 27 single player levels and nine deathmatch levels, started development on February 22, 2015 and initially finished development on June 22, 2015. Twisted, which had 27 single player levels and 18 deathmatch levels, started development on July 23, 2015 and initially finished development on November 23, 2015. Wrath and Twisted were created by David Biermann. All four of the mods were released on December 31, 2015. Davepack, Wrath, and Twisted each received an update on November 22, 2017.
- Operation: Reckoning