he Green Machine is a 12-level PK3 for Doom II that requires the GZDoom source port to play. It was the second mapset created by speedrunner Andrea Rovenski (Cyberdemon531), and features such additions as decorate monsters, 3D floors and scripted events. Released in November 2014 as part of her continuing SecretDoom series, The Green Machine features medium to hard maps, with improved atmosphere and level design over her initial offering, Disrepair.