Megawad

A megawad is a fan-made PWAD that, according to the idgames archive definition contains 15 or more levels.

Megawads can encompass the efforts of a single person, or the joint efforts of a entire team; this is usually done with the help of the community through specialized projects that aim to smoothen the development process, as well as allowing level authors to sign up for the project. Megawads often garner considerable attention and have been a significant portion of Cacowards winners.

Given the threshold of 15 levels to be considered a megawad, episode replacements of eight or nine levels (comparable to original Doom's episode structure of eight levels and a secret level) are not megawads. Thus, in 2018, when John Romero announced his SIGIL episode as a "megawad", the Doom community did not accept it as such.

History
While the ultimate origin of the word will probably never be determined, the term "mega-WAD" was used by Denis Möller of The Innocent Crew in 1995 to describe the Memento Mori project. The following year, Yonatan Donner used the word "megawad" to describe his upcoming project, Hell Revealed. The word soon became commonly used within the Doom community.

Full game replacement

 * 2002 A Doom Odyssey
 * Base Ganymede: Complete
 * Deathless
 * Doom the Way id Did
 * Wonderful Doom

Episode replacement

 * Classic Episode
 * The Classic Episode, Part 2
 * Crusades
 * Double Impact
 * Fava Beans
 * Knee-Deep in ZDoom
 * Phobos: Anomaly Reborn
 * Return to Hadron
 * Thy Flesh turned into a draft-excluder

Full game replacement

 * 10 Sectors
 * Akeldama
 * Alien Vendetta
 * Ancient Aliens
 * Back to Saturn X
 * Claustrophobia 1024
 * Claustrophobia 1024 2
 * Community Chest
 * Community Chest 2
 * Community Chest 3
 * Community Chest 4
 * Congestion 1024
 * Demonfear
 * Doom 2 the Way id Did
 * Doom 404
 * Epic 2
 * Eternal Doom
 * Eviternity
 * Going Down
 * GothicDM
 * Hell Revealed
 * Hell Revealed II
 * Icarus: Alien Vanguard
 * Japanese Community Project
 * Jenesis
 * Kama Sutra
 * Memento Mori
 * Memento Mori II
 * NeoDoom
 * Requiem
 * Resurgence
 * Reverie
 * Revolution!
 * Scythe
 * Scythe 2
 * Speed of Doom
 * Sunlust
 * Swift Death
 * Unholy Realms
 * Valiant
 * Vile Flesh
 * Whispers of Satan
 * Zone 300
 * ZPack - Random Maps for ZDoom

Episode replacement

 * Combat Shock 2
 * Dark7
 * The Darkening
 * The Darkening Episode 2
 * Dystopia 3
 * Lunatic
 * Scythe X
 * SlayeR
 * Stardate 20X6
 * UAC Ultra
 * Vanguard