* DevelopmentHell: The commercial game fell into this: after being delayed for multiple years for quality reasons, publisher Creator/ParadoxInteractive ultimately cancelled it in mid-2012. Reasons given included that it wasn't nearly ready for release and that the project leaders insisted it was ready and "reacted with irritation and anger" when Paradox pointed this out to them.
* KeepCirculatingTheTapes: Due to the deal with Paradox for a commercial game, the mod as such had to be removed from the official forum. Once the game got cancelled and thanks to the hostilities on Ubik side, the mod never returned to the forum and eventually everything related to it got purged entirely. Pretty much all of the other places hosting files for it died over the years, too, while those few remaining contain outdated or incomplete files.
* WhatCouldHaveBeen:
** Aside the obvious "what if Magna Mundi got released as a game on its own", there is another layer of it. The mod as such never full embraced ''Heir to the Throne'' and especially ''Divine Wind'' expansions, because work on it shifted to the full game around the time those expansions were released. This left Magna Mundi for the most part stuck with ''In Nomine'' game mechanics, never making much use of things added later to the game and eventually sentenced the mod into obscurity even before the whole mess related with cancellation of full game happend.
** When Paradox held pool among own playerbase which of the mods for ''Europa Universalis'' should be turned into a full game, the competition was mainly between Magna Mundi and MEIOU mods, with MM winning only by small margain. Considering the disastrous development of Magna Mundi and the fact MEIOU not only successfully finished its development for [=EU3=], but also migrated to [=EU4=] as probably the most competent and complex mod in existence, with stable, reasonable mod team and no ego issues in sight, one can only wonder what would have been if MEIOU was picked instead.