Endings

There are three different endings in the game that you can obtain: ID, Superego (or SE), and Alter Ego (or AE). It should be noted that personality tests don't affect which ending you obtain.

ID
The ID ending, often considered the worst ending can be obtained by choosing options that promote impulsiveness and freedom. This leads to Es giving into her impulse and subsequently giving this ending.

Superego (SE)
This ending is often considered the 'neutral' ending. It can be obtained by agreeing with Ego Rex's ideals of conformity and choosing answers that promote said ideals.

Alter Ego (AE)
This is the true ending, and can only be obtained after getting both 'bad' endings. To obtain this ending, you must choose the ambiguous endings that stand the middle path.

ID
In the ID ending, Es starts to reject the world around her, calling you her dream. In 3-1, she mentions she won't be giving any more personality tests because "it's all just a farce". Throughout the story, she becomes progressively more unstable, rejecting the world more and more, and falling into solipsism. During this period, black bubbles representing Es' thoughts appear in the endless room, with more and more appearing throughout the game. Tapping on them makes them shake and disappear, and give you more EGO than normal bubbles do.

Eventually, she shows you a book titled "Alter Ego", saying she wants to read it but is worried about it, asking you to read it with you. The story tells the tale of a girl (Es) and a wanderer (you). It portrays that the girl is guiding the wanderer, but simply doesn't realize that she, herself, is the wanderer. Es informs you that the story trails off after that, and asks you what you think happens in the end. Black bubbles saying "Choose impulse" fill the screen, covering all the options but "The world should not be permitted to exist", forcing you to choose that option (tapping the bubbles does nothing). Es narrates the ending, saying the girl denies herself the world, and that the ending was premeditated and was chosen from the start. After stumbling over her words and telling you she understands now, she ends with her signature telling to hurry back when you have more EGO. When returning to the endless room, all bubbles are black.

Returning to Es for the final part, she goes mad, and completely denies the world. The book shelves around her lose their books, and she is seen with a maniacal smile, which has been compared to a velociraptor. Her dialogue ends with her asking you to forgive her, and the ending ends with a mirror shattering with Es seen in the reflection.

When going back to the endless room, Ego Rex appears and scolds you, telling you that you failed. They reiterate that Es must be restrained, and if you wish to restart and erase the steps you've taken, you must go to Es' room where a reset option is available.

Superego
In the SE ending, Es starts to feel "unclean", and even mentions constantly washing her hands, thinking to scrub off a hypothetical spot. She mentions feeling antagonistic, and asks what it means to be dependent. She also mentions she won't be conducting any more personality tests. Rock like bubbles start appearing in the endless room, not unlike Ego Rex's speech bubbles, representing Ego Rex's thoughts of conformity. Tapping on them causes them to crumble and give more EGO than normal bubbles.

Es eventually shows you a book titled "Alter Ego", saying she wants to read it but is worried about it, and asks to read it with you. The story tells the tale of a girl (Es) and a wanderer (you). It portrays that the girl is guiding the wanderer, but simply doesn't realize that she, herself, is the wanderer. Es informs you that the story trails off after that, and asks you what you think happens in the end. Stone speech bubbles cover the screen, saying "choose conformity", forcing you to choose the option of "The girl should not be permitted to exist". Es narrates the ending, saying that the ending was chosen from the start, and there is nothing she could do. She tells you to come back when you have more EGO. Upon reentering the endless room, all the bubbles are Ego's Rex's.

Once you go back to Es, she says that she has realized she was the villain of the story, and that the world was created for you, the wanderer, by Ego Rex, and that she was placed there to pull the wool over your eyes. She congratulates you for getting past her, and says she'll be leaving, comparing herself to a harlequinn, even saying "Exit Harlequinn, stage left". Her dialogue ends with a plea of help and an empty mirror.

Upon returning to the endless room, now with Ego Rex's face in place of the once black walls, you encounter Ego Rex who congratulates you, saying that you're on the right path. They say that if you have any regrets, you can go back to Es' room to wipe clear the steps you've taken. When going back to Es' room, it's empty, and choosing the reset option has some text on the prompt with Ego Rex's text box saying "Will you reset?" and "Why? You're on the correct path." respectively.

Alter Ego
During the AE ending, Es starts having strange dreams with extreme endings: either she ceases to exist, or the world ceases to exist. She questions if both of those are realities that she desired, and that if they are reality and she is dreaming. She mentions that she would no longer conduct personality tests. Unlike the other endings, all the whispers in the endless room stay white and give normal amounts of EGO.

Eventually, you are shown a picture book titled "Alter Ego" by Es, saying she is scared to read it but feels she must, asking you to read it with her. The story tells the tale of a girl (Es) and a wanderer (you). It portrays that the girl is guiding the wanderer, but simply doesn't realize that she, herself, is the wanderer. Es informs you that the story trails off after that, and asks you what you think happens in the end. Unlike the other endings, no whispers cover your screen, leaving you with the options "The world should not be permitted to exist", "The girl should not be permitted to exist", and "The girl continues searching, for herself, and the wanderer". Choosing either of the first options initiates an SE or ID ending respectively, while choosing the last one finishes the AE run. Es narrates the ending, and says that there is more than one ending, meaning there must still be hope for her, and to hurry back when you have more EGO. The whispers stay normal when you return to the endless room.

Going back to Es, she thanks you, saying she has found her answer: that she'll continue searching; with you. She says that thanks to you, she has found herself, and can continue to stay herself. She says that this is her world, and she belongs to it, like you belong to yours, and says that you can go, and expresses confusion when you don't leave. She asks herself if that's what she desired as well, a world with you, and says you are always welcome with her, "my wanderer". Her dialogue ends there, and the credits play with a voice version of Silence, the song that plays in Es' room.

When returning to the endless room, Ego Rex congratulates you (leading to the iconic phrase "Congratulations, truly"), and says you have found your true path. They say that if you wish to reset, the reset button is in the same place as ever, but urges you not to, as you would be robbing Es of her happy ending. Going back to Es' room will have many more options than just the reset button, and is where you can access DLCs once you download them. If you scroll past the reset option, there are recollections of the entire game.