A megawad is a fan-made PWAD that, according to the idgames archive definition[1], contains 15 or more levels, or nears the size of a commercial or registered IWAD. A megawad may be the effort of one person, such as Gwyn Williams' Vile Flesh megawad, or of several people, such as the Doomworld community megawad project Community Chest 2. Whether a solo or group effort, high quality megawads require a huge time investment and can take months or years to create. A megawad may well represent a Doom mapper's collective lifetime works, such as Jan Van der Veken's Classic Episode, which is mostly a collection of levels previously released as standalone WADs.