Story Part 2
This epilogue to Act 1's story was only added after a complaint people had about a character being removed. This was the same epilogue where we found the true nature of Arcaea's world.
Silent Answer
This song was named after the supposed center of a black hole and is also the first song to remove the note lanes during its alternate mode.
Singularity
This song pack is a collection of songs available for $1 per song, whereas every other song can be found in song packs. In a recent update, they added one free song to this pack.
Memory Archive
Daily Double
This setting changes the colors of the Arcs from blue and pink to colors that are easier for certain people to see.
Colorblind Mode (Double Points if they guess the colors Blue and Yellow)
This pair of Partners are twins, one named after the Latin word for moon and the other being named after a part of the French word for star.
Eto & Luna
Daily Double
This Act 2 chapter was originally hidden as a side story, but was later revealed to be the start of Act 2 with the addition of its additional chapter, which has a more dangerous-sounding name.
Lasting Eden (Double Points if they managed to guess Severed Eden as well)
This song is required to finish Act 1's story and is unlocked with its epilogue. It grants you access to the entries titled One Last Dream and A Perfect Wish, and is the first song to have a variation based on what difficulty you're on or what Partner you're using.
Last (Last (Moment) and Last (Eternity) are acceptable guesses)
This song pack used to only be available for people with the Nintendo Switch port of the game, though it was eventually added to the mobile version.
Divided Heart
There are a total of 5 difficulties in the game, with each being named after a different time. These difficulties are listed from easiest to hardest, though difficulties 4 and 5 are never available on the same song, limited to only a select few.
Past, Present, Future, Eternal, Beyond
This pair of Partners becomes one after one of them disappears in Arcaea, though this only happens because the other found something out about their past.
Alice & Tenniel
This chapter of Act 2's story is the first main story chapter to have an odd number of entries, with there being 7, which often represents perfection. Ironic that one of the words in its title means nothing.
Absolute Nihil
This song requires you to go through a three-part substitution cipher before throwing you into the course, where this song is the final song of said course.
Arghena
This song has the unique gimmick of not having any standard tap notes, instead using mostly sky notes and Arcs.
Hivemind
Partners typically have one skill until they're Awakened. To Awaken a Partner, they must be at level 20 and you must have a certain type of core. The maximum level for Awakened partners is changed from 20 to this.
30
This Partner was added after the song Mirzam, with their name being derived from it. They are the only Partner to be seen with a proper weapon.
Mir
This specific story entry, once read, changes most of the story entries in the same chapter, with the changes being highlighted in purple text.
Entry 20-8
This song is unlocked by playing a timed memory game that finishes with a spot-the-difference. Spotting the difference lets you play the song, which features Saya and Lethe on its cover art.
Alter Ego
This song was released with Saya on its song cover, despite her not being a Partner in the game yet. It's also the only song to have a judgment line that isn't purple.
Alexandrite
This alternate mode is only available for very few songs and activates different visual effects, with the name of these events being a synonym for abnormality.
Anomaly Event
This Partner is not usable on their own until they are level 20, nor can they be leveled up manually like the others. This Partner also has the unique ability to usurp other Partners' abilities during gameplay.
Insight
When it comes to story structures, there is often a 3-act system. Act two is named after an alternative world for "cataclysm."
Catastrophe
This song was the first song to have a challenge rating of 11+, and managed to almost match the difficulty of Testify with its complex note patterns. This song, despite it being the final song you're required to unlock, also unlocks another song.
Designant
This song is the only other song to require a Potential of 11 to unlock, alongside Aegleseeker, though is considered more difficult.
最強STRONGER
Tairitsu
Daily Double
This partner is implied to be Tairitsu, despite their appearances being completely different. While her original name is also different, her Seeker name seems to fit both of them.
Nell (Double Points if they also got her Seeker name, Forlorn)