- Author Existence Failure: Due to the death of Lailah's Japanese Voice actress, Miyu Matsuki, Lailah has been recast by Noriko Shitaya for the anime.
- Christmas Rushed: While there has been no confirmation if this is true, given the series history of this trope, the games issues are often seen by many as being a result of being rushed to meet the 20th anniversary of the series. The game past the quarter mark (roughly around Mariland) shifts gears story wise, and numerous events occur quickly with the player being told to do a large series of quests to travel the world, during which little happens narratively speaking, and in general several plotlines are hastily scrambled together and completed with fairly anticlimactic resolutions. Gameplay wise, the bosses all become incredibly difficult due to Fake Difficulty, and the games balance heavily breaks to the point where the player is more or less forced to use Armatization all the time to win. Not helping is that, following from a out of game timeline example, things like Rose's reveal being only a mere year before the games release, in addition to other factors like early game footage, imply that the game hit some kind of issue a year before its release.
- Dawson Casting: Initially averted with Michael Johnston, who was 18- the same age as Mikleo- when he first auditioned for the game.
- Dueling Games: The PC version with the PC port of Mugen Souls, both being Japanese RPGs released close to each other on PC (and both being Polished Ports).
- I Knew It!: Honestly, who didn't see Maltran being evil coming a mile off?
- Lying Creator: In response to the whole Alisha controversy, Word of God stated that the characters were advertised based on in order of when they joined, which was why Alisha appeared heavily at first but then left a few hours in. However in Japan, the trailers initially showed the order as: Sorey, Alisha, Mikleo, Edna, Lailah, Dezel, Zaveid, and Rose, instead of the "correct way": Sorey, Mikleo, Alisha, Lailah, Edna, Rose/Dezel, Zaveid. Adding to this, Alisha was originally shown to be fighting alongside Dezel in an area she never visits in gamenote , making the claim wrong, much the frustration of many.
- Milestone Celebration: The 15th Mothership Title for the 20th Anniversary.
- The Other Darrin: Lunarre and Maltran are voiced by Austin Tindle and Rachel Robinson in the dub of the anime. Averted with the party members, as everyone has their voices from the games; in Mikleo's case, there was some doubt until the broadcast dub showed that it's the same guy using an alias.
- Playing Against Type: Christine Marie Cabanos, a voice actress known for her high-pitched voice and often typecast into Nice Girl and/or Token Mini-Moe, voices Symonne, a villain.
- Role Reprisal: Takehito Koyasu/Kirk Thornton and Kana Hanazawa/Cassandra Lee reprise their roles as Jade and Sophie, respectively.
- All of the main cast reprised their roles for the English dub of the anime, though Michael Johnston is credited as Philip Lamont.
- Troubled Production: Namco was mostly hush-hush about the games developments, but some information released around or after its development show some trouble during the games development.
- The Seraphim being Invisible to Normals presented problems for the writing team, as they had to find a way to make the Seraphim fleshed out, but only a handful of characters could hear or see them. This also effected the setting as well, as the team had trouble trying to convey the seriousness of the Lord of Calamity when few people could comment on it. The team expressed concern this limited the appeal of the party members as a result.
- The choice was made to stick to the Playstation 3 over the Playstation 4 because the team was hesitant to use the new systems of the Playstation 4. The result was that the game had to be limited to what the Playstation 3 hardware could do, limiting their ability to make the game look as good as they had planned. The team had to create a new engine as well, which took more time as well. The choice for the real time transitions in battle also created problems for the team, who had never done anything like it before.
- The team had to essentially redesign the Xillia gameplay system to make Zestiria work, which proved harder to do because the mechanics of Zestiria were different from Xillia. They ran into problems designing the battle mechanics as well because the choice to do real time transitions meant they had to work with it, meaning the core gameplay mechanics were secondary to the camera transition.
- The team was hit by staff shortages. Combined with all the previous explained issues, it meant the team was working on a new title, engine, and mechanics without a full team to support them. Not helping was that the game had to be released in time for the series 20th anniversary, meaning the team couldn't delay the game either.
- Word of God: Alisha's departure was always planned but kept secret to preserve the plot twist. The scenario designer, the director, and her character designer all stated in various interviews that the story was always planned with her exit in mind, and the producer argued that she was only promoted first because she shows up first.
- Word of Saint Paul: Chris Niosi (Dezel) did a podcast along with Michael Johnston (Mikleo), Kira Buckland (Edna), and Xander Mobus (Sergei Strelka). Among interesting behind-the-scenes stories, Niosi remarks that Dezel has a thing for Rose; Johnston then remarks that Mikleo has a thing for Sorey.
Trivia / Tales of Zestiria