History EarlyInstallmentWeirdness / OtherMedia

* ''Animation/FlowerFairy'' features multiple magical girl protagonists as leads, starting with Xia An'an and her friends... for the most part. Season 1 features only An'an as the main magical girl, with the other magical girls slowly being introduced and/or gaining their powers and fairy companions throughout Season 2. The "four magical girls" format would be replicated in Xiaoai's story arc.

* ''Animation/FlowerFairy'' features multiple magical girl protagonists as leads, starting with Xia An'an and her friends... for the most part. Season 1 features only An'an as the main magical girl, with the other magical girls slowly being introduced and/or gaining their powers and fairy companions throughout Season 2.

* A few rules established in ''VisualNovel/FateStayNight'' and maintained for ''LightNovel/FateZero'' were quietly swept under the rug or adjusted in later installments such as ''VideoGame/FateExtra'' and ''VideoGame/FateGrandOrder'', in the interest of creating more varied and interesting Servants. These include the Assassin class being relegated exclusively to different incarnations of a single hero ([[spoiler:Hassan-i Sabbah]]) unless exceptional circumstances are at work ([[spoiler:see Kojiro's case]]);[[note]]A ''lot'' of interesting real-life personalities fit into that class, but not necessarily any others, wasting potentially great Servant concepts. The retcon used was that the ''specific incarnation'' of a Grail War in Fuyuki required that class be filled by the Hashashin[[/note]] Berserkers being so consumed by their madness they can't talk;[[note]]Increases the difficulty of making such characters interesting[[/note]] the Berserker class in-general being available to heroes of all backgrounds, existing primarily as a means of powering up weaker Servants at the cost of their sanity;[[note]]This is still done on occasion, but most Berserkers nowadays are heroes whose backstory already includes some form of madness or rage, making the class more consistent with the others[[/note]]; and the prohibition on Eastern (ie. Asian) Servants being summoned[[note]]The conceit of the Holy Grail as a Western concept meant that the war was intended for westerners only but it was later reworked into something solely exclusive to Fuyuki.[[/note]].

[[folder:Tabletop Games]]
* The rules of chess went through several changes until they reached the ones we're familiar with today. In the old Indian and Arabic versions of the game, the bishops were elephants and could only make short moves (although they were able to jump over pieces like the knights), the queen was a vizier (and the weakest piece in the game, as opposed to being the strongest nowadays), pawns couldn't move two squares on the first move, there was no castling or en passant, pawn promotion was limited in different ways, etc. The pieces didn't gain all of their modern characteristics until the late 1400s, although even as late as the 19th century either black or white could move first, stalemate rules were different, and (at least in some regions) ''[[GameBreaker the queen could move like a knight]]''. In the earliest versions of chess, it even had four players.
[[/folder]]

* ''ARG/WelcomeHome'': From Clown Illustrations' official Twitter account, production of the series dates back to 2018, and the [[https://twitter.com/_PartyCoffin_/status/1008180462815068162 initial lineup of characters]] was drastically different, as Sally Starlet, Howdy Pillar, and Eddie Darling were not created at that time.

* The rules of chess went through several changes until they reached the ones we're familiar with today. In the old Indian and Arabic versions of the game, the bishops were elephants and could only make short moves (although they were able to jump over pieces like the knights), the queen was a vizier (and the weakest piece in the game, as opposed to being the strongest nowadays), pawns couldn't move two squares on the first move, there was no castling or en passant, pawn promotion was limited in different ways, etc. The pieces didn't gain all of their modern characteristics until the late 1400s, although even as late as the 19th century either black or white could move first, stalemate rules were different, and (at least in some regions) ''[[GameBreaker the queen could move like a knight]]''.
** In the earliest versions of chess, it was a hugely different game, with four players.

* There has actually been a time when most of today's major religions were nothing but small cults centered in one region. And there has also been a time when religion as such didn't exist, though mostly because there were no humans to begin with.

** The first movie, which is also the first of the WesternZodiac-themed movies, doesn't have the designated zodiac animal (the bull) featured as a character like the later ones. Instead, they simply give the bacteria kingdoms a bull motif in their names (White Bull Kingdom, Black Bull Kingdom, and Yellow Bull Kingdom).
** The first movie does not feature [[EnemyMine the goats and the wolves forming a team]], something that the later films would become known for.

* From the 1st until the third century AC, Christianity was suppressed in the Roman Empire. Christians were seen as insane, cult-like, possibly even cannibalistic (they ''did'' say they "ate flesh and drank blood", after all). Then the Christian-sympathizing (and later outright Christian) Constantine the Great and his short-lived co-emperor Licinius issued the Edict of Milan in 313 granting toleration to all religions. Still a minority religion at the time, Constantine greatly favored Christianity and discouraged, but did not ban, non-Christian faiths. After Theodosius the Great made it state religion in 380 it completely became the other way around. Now everyone who ''wasn't'' Christian was forced to give up their beliefs.

** The earliest parts of the Old Testament use a variety of Hebrew names for God other than Yahweh, most notably "Elohim". Most scholars conclude that the authors were likely polytheists referring to different deities - only as monotheistic Judaism later developed did Yahweh become the standard, and the earlier names were reinterpreted as merely different names for Yahweh. Others simply assume those were other epithets for God before he revealed his name to Moses, a name that wasn't spoken and so in keeping with that had 'the Lord' used in translations.
** There are a few verses early in the Old Testament which seem to say or imply that there are multiple gods, mostly in Genesis and Exodus. There is some evidence that the ancient Hebrews may have initially been henotheistic (believing in multiple gods while only worshipping one) rather than strictly monothestic, so it's possible said verses are [[TheArtifact "leftovers"]] from earlier versions of the books in question.

* UsefulNotes/MicrosoftWindows: Early versions of the operating system[[note]]Technically, the earliest versions of Windows couldn't be considered true operating systems, since they ran on top of MS-DOS and used it to provide certain functions[[/note]] were quite different from what we know today. Windows 1.0 didn't allow Windows to overlap, because Apple had [[DisneyOwnsThisTrope patented that feature]], though Windows 2.0 finally added it. It wasn't until Windows 95 that the Windows interface gained most of the iconic elements we know today, such as the start menu, taskbar[[note]]Windows 1.0 had a more limited version of the taskbar that was used to hold minimized application, an essential feature since the windows couldn't overlap.[[/note]], and the 3 button combination (minimize, maximize, and close) on the right side of the window title bars[[note]]Prior versions only had the first two; closing window required using the window menu on the left side of the title bar[[/note]] that almost all versions of Windows have had since.

* It was really easy to see how long someone would stick around in ''VisualNovel/DanganronpaTriggerHappyHavoc'' by their number of Free Time Events. For example, the first victim only has two of them. In ''VisualNovel/Danganronpa2GoodbyeDespair'' and ''VisualNovel/DanganronpaV3KillingHarmony'', however, all of the students have six Free Time Events regardless of lifespan.

* UsefulNotes/MicrosoftWindows: Early versions of the operating system[[note]]Technically, the earliest versions of Windows couldn't be considered true operating systems, since they ran on top of MS-DOS and used it to provide certain functions[[/note]] were quite different from what we know today. Windows 1.0 didn't allow Windows to overlap, because Apple had [[DisneyOwnsThisTrope patented that feature]], though Windows 2.0 finally added it. It wasn't until Windows 95 that the interface gained the iconic elements we know today such as the start menu, taskbar[[note]]Windows 1.0 had a more limited version of the taskbar that was used to hold minimized application, an essential feature since the windows couldn't overlap.[[/note]], and the 3 button combination (minimize, maximize, and close) on the right side of the window title bars[[note]]Prior versions only had the first two; closing window required opening the window menu on the left side of the title bar[[/note]] that almost all versions of Windows have had since.