Complete the indicated task to unlock the corresponding ending. There are a total of 26 endings, with endings A-E being the normal endings and endings F-Z the comical endings.

Ending A: One Battle Ends: Successfully complete the game.
Ending B: Or Not To Be: Load the save date after getting Ending A, then complete the game again.
Ending C: Meaningless Code: Load the save date after getting Ending B. When A2 and 9S confront one another during the final battle during your third playthrough, select A2. Defeat 9S, then traverse the area to reunite with him. Watch the credits play.
Ending D: Childhoods End: Load the save date after getting Ending B. When A2 and 9S confront one another during the final battle during your third playthrough, select 9S. Defeat A2, then select "I'll go with you" in the text section. Watch the credits play.
Ending E: End Of Yorha: This is a continuation of Ending C or D. When A2 and 9S confront one another, select 9S or A2. Complete the battle and watch the credits play. Select "Yes" for all the questions that appear, then complete the credits mini-game.
Ending F: Mission Failed: During the second playthrough, hack the machine with attack units and wait until the time runs out.
Ending G: Hungry For Knowledge: Get Ending A and fail the mission when you see 9S arrive at the crane.
Ending H: A Mountain Too High: Abandon the missing to fail the mission when the Goliath is in the city.
Ending I: No I In Team: During the first playthrough, take down the Boss in the Copied City but run from 9S.
Ending J: Bad Judgement: Kill the pastor during Chapter 09-01_3.
Ending K: Aji Wo Kutta: Eat Mackerel fish at the Desert Camp after meeting with Jackass.
Ending L: Lone Wolf: Run from the Sphere boss in Chapter 10-02.
Ending M: Break Time: While playing as A2, do not enter Pascal's Village.
Ending N: No Man's Village: Kill villagers in Pascal's village.
Ending O: Just You And Me: Run away from the final Boss fight during Ending C.
Ending P: Corruption: During the third playthrough, let 2B die while it has the virus.
Ending Q: Questionable Actions: During the third playthrough, lose 2B while playing as 9S.
Ending R: Maverick: Take down friendly robots near Pascal in Chapter 14-05.
Ending S: City Escape: During the third playthrough, run away from Popola and Devola after the tower section begins.
Ending T: Fatal Error: At any point during the game, open your menu and select the "Skills" tab. Select "Plug-in Chips", "Destroy Chip", "Equipped Chip", "OS Chip". Selecting this will display the following warning: "An android's central system. Removal means death." Remove the OS Chip to reboot and view the credits.
Ending U - Debunked: Use the self-destruct command (press L3 + R3) inside the bunker.
Ending V: Reckless Bravery: In Chapter 17-01, fight alongside Popola and Devola.
Ending W: Broken Wings: Die during the first mission of the game (Ace Combat Arcade).
Ending X: Time To Relax: Do not help A2 and 2B meet when they are meeting at the commercial center.
Ending Y: Heady Battle: Make Emil self-destruct during "Emil's Determination".
Ending Z: Overzealous: Save Pascal and kill her.