Chaos;Head guide

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   INTRODUCTION
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Chaos;Head (C;H) is the first visual novel installment in the Science Adventure series, taking place before Steins;Gate and Robotics;Notes Elite.
It is highly recommended that you read C;H rather than watch it, due to its unfaithful and generally disappointing anime adaptation. This is a guide to getting all possible endings within the visual novel. Explanations on other mechanics featured within the game are included.

This guide is spoiler-free EXCEPT for the B ending section, which should only be read after completing the game once. Any necessary spoiler text has been scrambled using the rot13 cipher, and can be unscrambled using ROT13.com

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   DELUSION TRIGGERS
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Chaos;Head's gameplay revolves around the use of the "Delusion Trigger" system, which allows the protagonist to view positive delusions, negative delusions, or no delusions at all at various points in the story. At points in the game, green and red dots will appear at the top of the game window, and clicking on them will allow the player to view either a positive or a negative delusion respectively. Ignoring these dots will allow the protagonist to stay grounded in reality.
Positive delusions are often steamy and sexy in nature, and negative delusions are often gory and violent in nature. Choosing different delusions won't affect your first playthrough of the game, but they become essential for reaching the B ending in your second playthrough (explained below).

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   CHAPTER 6 DOORS (***Unscramble spoiler text with ROT13.com***)
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A set of YES/NO questions will be presented during Chapter 6 at the O-FRONT scene.
To get the bad ending, save first, then answer:
1. (NO) V fnj n fjbeq
2. (NO) V fnj n fjbeq-rfdhr bowrpg
3. (NO) V fnj vg nf n unyyhpvangvba
This immediately gives you the bad ending.

To continue the story, answer:
1. (YES) V fnj n fjbeq
2. (YES) V qvfgvapgyl fnj n fjbeq
3. (NO) Vs V pbhyq zbir sebz urer, V pbhyq tb gnxr vg
4. (NO) Lbh pna frr gung fjbeq sebz cynprf bgure guna urer
5. (YES) Vg'f abg npghnyyl n fjbeq

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   A + AA ENDINGS
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The A ending is just a gimped version of the AA ending, which is the true ending. You can skip getting the A ending.
To get the AA ending, answer the questions in chapter 10 as follows:
1.  (YES) Lbh ner zr
2.  (YES) V nz lbh
3.  (NO) V qba'g rkvfg
4.  (NO) Lbh qba'g rkvfg
5.  (NO) V'z abg zr
6.  (YES) Lbh ner zl oeb
7.  (YES) Lbh ner Avfuvwbh-xha
8.  (YES) Lbh ner Gnxhzv
9.  (YES) Lbh ner Gnxhzv-funa
10. (YES) Lbh ner Avfuvwbh
11. (YES) Lbh ner Gnxh
12. (YES) V nz zr
13. (YES) V'z n qryhfvbanel rkvfgrapr
14. (YES) V rkvfg
15. (YES) V nz Avfuvwbh Gnxhzv

To get the A ending, answer question 15 with (NO).

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   B ENDING, SECOND PLAYTHROUGH
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The B ending is attainable after starting a new game of C;H, and relies solely on choosing the right DELUSION TRIGGERS. You need to view at least 11 of the triggers listed below to enter the B ending. There is a skip function within the VN that stops at delusion triggers, so this should not take too long.
The following is a list of delusions that you can activate to reach the B ending. Remember, you need at to view at least 11 of these.

   Chapter 1:
Delusion Trigger 1 (While in class, talking to Misumi) - Neutral (no delusion)
Delusion Trigger 3 (Yua is looking at you from across the street) - Neutral
   Chapter 2:
Delusion Trigger 8 (During the Phantasm performance, while watching FES) - Positive
Delusion Trigger 9 (After the Phantasm performance, while playing ESO)) - Positive
   Chapter 3:
Delusion Trigger 12 (At the base, looking at your PC, right before Rimi's first appearance) - Positive
Delusion Trigger 13 (On the top of the school, after meeting Rimi in class) - Negative
   Chapter 4:
Delusion Trigger 17 (At the internet cafe with Yua) - Neutral
Delusion Trigger 18 (In the park) - Negative
   Chapter 5:
Delusion Trigger 20 (The first trigger of the chapter, at school) - Positive
Delusion Trigger 24 (After school, at the shoe locker when Rimi covers your eyes) - Negative
   Chapter 6:
Delusion Trigger 25 (When Shogun enters the chat after the earthquake) - Positive
Delusion Trigger 28 (Looking down at the crowd) - Neutral
   Chapter 7:
Delusion Trigger 30 (After waking up in the hospital and meeting the nurse) - Negative
Delusion Trigger 34 (While talking to Sena and Kozue) - Negative
   Chapter 8:
Delusion Trigger 36 (When Takumi and Misumi couldn't find Ayase at the hospital) - Neutral
Delusion Trigger 37 (When Ayase starts talking to Takumi about the Knights of Glajioul in her room) - Negative
   Chapter 9:
Delusion Trigger 43 (When Taku hears Nanami's voice after chatting with Grim) - Positive
Delusion Trigger 44 (When Taku is standing before the crowd of people) - Neutral


Viewing at least 11 of these delusions will lead you into the B route. You will know that you're in it when a certain scene with Sena, Hatano, and Norose at the underground train station begins.

-------NOTES-------
Originally written by repgatu, edited by Kiri Kiri Basara. B ending information from MrMonday and RCgamer77.
For troubleshooting, visit this Discord server (use spoiler tags if appropriate): https://discord.gg/YBmZzfA