Super MAYhem 17 (MAYHEM17.WAD)

MAYhem is a time when Doomworlders can band together and throw their weight behind an arbitrary set of restrictions. The series had a rough start in terms of meeting its megaWAD goal, with 2012 and 2013 fielding 12 and 11 levels respectively, but it hit its stride with MAYhem 2048, with each subsequent iteration meeting the "megawad" definition (in spirit with MAYhem 2024, which produced 35 segments to stitch together). The 2017-released-in-2018 installment goes by Super MAYhem 17 because the texture theme this go-around was Super Mario Bros.-themed, with an aesthetic that appears to be sort of a mix of Super Mario Bros. 3 and Super Mario World. This is a 28-ish level replacement for Doom II, to be played with Boom-compatible ports, with some fringe MAPINFO perks for ZDoom / Eternity users.

MAYhem 2016 (MAYHEM16.WAD)

The MAYhem series has built a PWAD for every May since 2012 and, starting with 2014, they've all been megaWADs. The project organizers have changed but the general procedure is the same. 1) Pick a texture pack in order to give the set a distinct identity. 2) Decide on some sort of limitation as a gimmick. 3) Kick the event off in May, where the bulk of the level design is (hopefully) performed. In this particular case the merry month was used for planning and logistics while the actual work was done in June. 2016 was really a tale of two gimmicks but you probably wouldn't realize either due to the necessities of the final product's presentation. It's a 21-level mapset for Boom-compatible source ports and, in spite of some promising progress, still drug ass until it was uploaded in early 2017.