Transcendent BeingThis trophy requires you to unlock all of the game's 26 (excluding DLC) endings. The referenced chapters are for the chapter select feature which you unlock after completing your third playthrough/route C. Only ending Y is missable, but it doesn't prevent you from unlocking this trophy. See the end of this solution to learn why (spoilers ahead).
Ending A: flowers for m[A]chines
Ending B: or not to [B]e*** Spoiler - click to reveal ***Load the cleared save from beating the game once and earning ending A. Play through the game again and complete all of the main story quests to achieve this ending.
Ending C: meaningless [C]ode*** Spoiler - click to reveal ***Load up and play through the game a third time. For the final boss battle, choose A2.
Note: If 9S is chosen instead, you can quickly acquire this ending by opening Chapter Select and choosing Ch. 17-09.
Ending D: chil[D]hood’s end*** Spoiler - click to reveal ***During your third playthrough, choose 9S for the final boss battle. During the text portion, you'll have 2 choices: "I'll go with you" or "I'll stay". Choosing either result obtains this ending, though the contents of each version differ.
Note: If A2 is chosen instead, you can quickly acquire this ending by opening Chapter Select and choosing Ch. 17-09.
Ending E: the [E]nd of yorha*** Spoiler - click to reveal ***Upon viewing either ending C or D once more (This can be done quickly through Chapter Select, Ch. 17-09), during the credits, you will be prompted by Pod 153 to perform a data check. If accepted, after a brief exchange between both pods, you will be prompted once more. Accepting the option stating you "wish for them to survive" will allow you to play a shooting minigame. Complete the minigame to unlock this ending.
Note: Dying repeatedly in the minigame will eventually prompt the player asking them if they want help (this only happens if you are connected to Xbox Live, in offline mode you will receive no help and it will be incredibly hard to finish the minigame.). Accepting the help will make this section trivial.
WARNING! When you are asked to delete your save file it means it, you will LOSE all progress, this includes other save files and you will become one of the helpers instead.
WARNING: When attempting to get any of the following endings, make sure to save first if necessary, as endings F through Z count as "bad ends" and will return you to the title screen without saving.Ending F: mission [F]ailed
Ending G: hun[G]ry for knowledge
Ending H: a mountain too [H]igh*** Spoiler - click to reveal ***[Ch. 05-02] Ignore the order to intercept the Goliath's attack on the city and abandon the mission. Taking the path from Pascal's Village to the Amusement Park easily achieves this.
Ending I: no [I] in team
Ending J: bad [J]udgement
Ending K: aji wo [K]utta*** Spoiler - click to reveal ***[Ch. 06-01] After giving your report to commander you'll receive an email titled "Jackass: Fish". Speak to her at the Desert Camp to obtain the mackerel item, which can be found in the "Caught Fish" menu. Eat it to earn this ending.
Ending L: [L]one wolf*** Spoiler - click to reveal ***[Ch. 10-01_3] OR [Ch. 10-03] Either exit the Resistance Camp while it's being attacked or abandon the entrance to Pascal's Village when the boss creature shows up.
Note: While you can acquire this ending two different ways, one involving abandoning Pascal, the ending text will always refer to abandoning the Resistance Camp.
Ending M: break ti[M]e*** Spoiler - click to reveal ***[Ch. 14-03] Don't go to Pascal's Village when it's attacked while playing as A2. Running to the back of the Resistance Camp, Factory or Amusement Park instead should trigger this.
Ending N: [N]o Man's Village*** Spoiler - click to reveal ***[Ch. 07-01] Destroy every machine in Pascal's Village.
Note: This can be done at various other times, but 07-01 seems like the easiest place to Chapter Select to.
Note: This does not require you to destroy the machines actively using the slide (if you've completed the quest which builds it) or the reclusive machine (though you can destroy him by attacking through the walls of his house).
Ending O: just y[O]u and me*** Spoiler - click to reveal ***[Ch. 11-03] Instead of proceeding forward to the City Ruins, simply run back towards the Factory. Alternatively, in [Ch. 11-04], instead of hacking into 2B when she is downed by the EMP, hack the other YorHa units around her until the mission fails, or simply walk away.
Ending P: corru[P]tion*** Spoiler - click to reveal ***[Ch. 11-06] Allow 2B to die from the virus.
Note: The quickest way to do this is to venture towards your objective (the Commercial Facility) and then just stand still before the bridge. It's quicker because the infection percentage jumps up when you're near your objective for the sake of suspense.
Note: Ending X can be acquired much more quickly if while attempting to acquire ending P you save at the vending machine near the bridge.
Ending Q: [Q]uestionable actions*** Spoiler - click to reveal ***[Ch. 11-07] Don't go to 2B's location near the Commercial Facility. Heading to the Desert area or back towards the Resistance Camp instead will trigger this ending.
Ending R: mave[R]ick*** Spoiler - click to reveal ***[Ch. 14-05] Attack the peaceful robots nearby Pascal. Going berserk in the room with Pascal and the children can also trigger this ending.
Ending S: city e[S]cape*** Spoiler - click to reveal ***[Ch. 17-01] When attempting to gain access to the Tower, abandon Popola and Devola after they attempt to protect you.
Note: You can acquire ending V much quicker while attempting to acquire ending S if you save after hacking and disabling the 3 defence nodes, but before approaching the Tower. You may also save at the City Ruins: Center save point area mid-battle, but be wary, as moving too far away from the fight (a little past the vending machine) will count as ending S and you be returned to the title screen.
Ending T: fa[T]al error
Ending U: deb[U]nked*** Spoiler - click to reveal ***[Ch. 06-01] Self-destruct while in the Bunker.
Note: Can likely be acquired during any visit to the bunker, but 06-01 is a quick and easy starting place if using chapter select.
Ending V: reckless bra[V]ery*** Spoiler - click to reveal ***[Ch. 17-01] When attempting to gain access to the Tower, fight alongside Popola and Devola instead of hacking the Tower (or alternatively just stand there watching).
Note: You can acquire ending S much quicker while attempting to acquire ending V if you save after hacking and disabling the 3 defence nodes, but before approaching the Tower. You may also save at the City Ruins: Center save point area mid-battle, but be wary, as moving too far away from the fight (a little past the vending machine) will count as ending S and you be returned to the title screen.
Ending W: broken [W]ings*** Spoiler - click to reveal ***[Ch. 01-01_1] Just die during the prologue. The easiest way is to be destroyed by the giant later.
Note: You should unequip any support chips before attempting this. You cannot change chips during flight.
Ending X: time to rela[X]*** Spoiler - click to reveal ***[Ch. 11-06] After reaching the Commercial Facility as virus-infected 2B and gaining control of A2, run away instead of helping.
Note: You can acquire ending P much quicker while attempting to acquire ending X if you save at the vending machine (City Ruins: Center) near the bridge.
Ending Y: head[Y] battle*** Spoiler - click to reveal ***Allow Emil to self-destruct at the end of the boss fight in the quest "Emil's Determination".
WARNING: This is the only missable ending. When letting Emil self-destruct, don't save if you complete the fight without acquiring this ending, as there is no way to start the fight again. If you want to get the ending and finish the quest, you can save at the Desert: Center vending machine which makes restarting the fight much quicker.
Ending Z: over[Z]ealous*** Spoiler - click to reveal ***[Ch. 14-01] After leaving the desert and encountering Pascal outside of the Resistance Camp, destroy the machines around him and then choose to kill him instead of sparing him.
*** Spoiler - click to reveal ***Alternatively, after finishing your third playthrough/route C, you'll be able to purchase this trophy from the Strange Resistance Woman (wearing a machine mask) inside of the Resistance Camp for 200,000G.
Source: https://nierautomata.wiki.fextralife.com/Endings+Guide