Bedlam (BEDLAM.WAD)

It's a wonder there aren't more community episodes. Why wait for a whole bunch of people to crap out the maps needed for an entire megaWAD when you can just band together and churn out an episode in a theoretical third of the time? Well, Doom lacks the dynamic range of action found in Doom II, and community Doom II episodes suffer from the mystique surrounding the megaWAD status that devalues anything that has less than 32 levels with some kind of inherent superstition. Also, in spite of being a mere episode, it took Bedlam two and a half years from its inception to release in mid-2014. The dream is still out there, though.

Doom 2 In Name Only (D2INO.WAD)

Doom 2 in Name Only arose out of discussions of Chris Klie's BF_THUD. After playing Klie's megaWAD, it's pretty clear that he took most of his design cues from the names of the map slots his levels appeared in. A thread by Hellbent prompted another thread by ella guro where the project took off and then stagnated until its untimely release in 2014 amid some controversy. The final product is a full-fledged megaWAD for Doom II that makes a claim for vanilla compatibility, but the sheer size of many of the submitted levels made for less than rigorous playtesting as far as technical details go. A limit-removing port should be used, at the very least.