Chapters/AI

*AI: THE SOMNIUM FILES* is divided into chapters, categorized here by Route. Each Day has a range of chapter between 1 and 4 per day within a single route, averaging about 3 per day.

Each Investigation chapter is titled with a Japanese word ending in "ai", romanized in lowercase text, with the final "AI" in uppercase. Conversely, each Somnium chapter is titled with an English phrase, starting with "PSYNCIN' IN THE" (or "SINKIN," in one exception) and ending with a word ending in "ain"; the entire title is capitalized except for the "ai" near the end.

 *Day 4: Monday*jikAI/自戒/**Self-Discipline***Day 5: Tuesday*zugAI/頭蓋/**Cranium**PSYNCIN' IN THE SUSTaiNsyokuzAI/贖罪/**Atonement** | *Day 4: Monday*syougAI/傷害/**Injury***Day 5: Tuesday*seisAI/制裁/**Punishment***Day 6: Wednesday*hiAI/悲哀/**Sorrow**PSYNCIN' IN THE CAPTaiNsanpAI/参拝/**Worship** | *Day 4: Monday*irAI/依頼/**Request***Day 5: Tuesday*dakkAI/奪回/**Rescue**PSYNCIN' IN THE MaiN: 2*Day 6: Wednesday*kekkAI/決潰/**Collapse** | *Day 5: Tuesday*kenzAI/顕在/**Evident**
🔒jutAI/受胎/**Conception**PSYNCIN' IN THE MOUNTaiNkokkAI/告解/**Confession**
🔒*Day 6: Wednesday*sousAI/相殺/**Offset**PSYNCIN' IN THE CHaiNhakAI/破壊/**Destruction***Three Months Later*kassAI/喝采/**Applause**

## Ota Route

### Day 1: Saturday

#### sigAI

Day 1: Friday –sigAI– is the first chapter of the game. On a November night, Kaname Date investigates the murder of Shoko Nadami at Bloom Park, and discovers a key witness to the case.

#### SINKIN' IN THE BRaiN

SINKIN' IN THE BRaiN is the second chapter and the first Somnium of the game. Kaname Date, while resting at Central Hospital, subconsciously calls for his partner, Aiba, to appear in his dream and navigate a memory from his missing past.

### Day 2: Saturday

#### saikAI

Day 2: Saturday –saikAI– is the third chapter of the game. Date begins his investigation into the murder of Shoko Nadami, follows a lead of an anonymous caller, and meets a net idol who insists on tagging along with him.

#### PSYNCIN' IN THE PaiN

PSYNCIN' IN THE PaiN is the fourth chapter and the second Somnium of the game. Date and ABIS Psync into the mind of Mizuki Okiura in order to find new evidence on Shoko's murder and possibly cure her aphonia. This Somnium Branches in two, leading to either –meikAI– in Branch A (Ota Route) or –keitAI– in Branch B (Iris Route).

#### meikAI

Day 2: Saturday –meikAI– is the fifth chapter of the game's A branch, which includes Ota Route, Mizuki Route, and Annihilation Route. Date, with Mizuki in tow, reinvestigates Bloom Park following a new lead from her Somnium.

### Day 3: Sunday

#### syokubAI

Day 3: Sunday –syokubAI– is the sixth chapter of the game's A branch. Date and Mizuki investigate the murder of a second victim, and the persons of interest seemingly connected to both victims.

#### PSYNCIN' IN THE VaiN

PSYNCIN' IN THE VaiN is the seventh chapter of the game's A branch. Date and ABIS Psync into the mind of Iris Sagan as a potential suspect for the second victim's murder, hoping to uncover a clue about "that thing" that she and Ota Matsushita know about. This Somnium Branches in two, leading to either –rihAI– in Branch A (Ota Route) or –gumAI– in Branch B (Annihilation Route).

#### rihAI

Day 3: Sunday –rihAI– is the eighth chapter of Ota Route and Mizuki Route. Kaname Date further investigates "that thing" that was discussed between Iris Sagan and Ota Matsushita.

### Day 4: Monday

#### youdAI

Day 4: Monday –youdAI– is the ninth chapter of the game's Ota Route and Mizuki Route. Kaname Date investigates the attempted third murder, broadcasted early morning live by the "Bloody Polar Bear," following leads on people connected to the new victim(s), both familiar and surprising.

#### PSYNCIN' IN THE SWaiN

PSYNCIN' IN THE SWaiN is the tenth chapter of the game's Ota and Mizuki Route. Kaname Date and ABIS psync into the mind of Ota Matsushita, in order to learn, and recreate, his fierce battle with the Bloody Polar Bear. This Somnium branches in two, leading to either the chapter –jikAI– in Branch A (Ota Route) or the chapter –syougAI– in Branch B (Mizuki Route).

#### jikAI

Day 4: Monday –jikAI– is the eleventh chapter of the game's Ota Route. Kaname Date and Boss interrogate Ota over the events of his confrontation with the "Bloody Polar Bear," as witnessed during the previous psync.

### Day 5: Tuesday

#### zugAI

Day 5: Tuesday –zugAI– is the twelfth chapter of the game's Ota Route. Kaname Date investigates the lead of a new suspect, following a shocking confession, as he attempts to find other potential suspects while the Psync Machine is being fixed.

#### PSYNCIN' IN THE SUSTaiN

PSYNCIN' IN THE SUSTaiN is the thirteenth chapter of the game's Ota Route. Kaname Date and Pewter psync with Mayumi Matsushita in order to uncover her lost memories and any relevant connections to the serial murders.

#### syokuzAI

Day 5: Tuesday –syokuzAI– is the fourteenth and final chapter of the game's Ota Route. Kaname Date resolves loose threads from throughout his investigation.

## Mizuki Route

This route branches from Ota's route at PSYNCIN' IN THE SWaiN.

### Day 4: Tuesday

#### syougAI

Day 4: Monday –syougAI– is the eleventh chapter of the game's Mizuki Route. ABIS speaks with Ota Matsushita about what they had witnessed during his Somnium.

### Day 5: Tuesday

#### seisAI

Day 5: Tuesday –seisAI– is the twelfth chapter of the game's Mizuki Route. Kaname Date and Mizuki Okiura pursue a brand new lead involving the culprit's DNA, as well as some bonding experience between the two roommates as they reflect on the murders that have occurred so far.

### Day 6: Wednesday

#### hiAI

Day 6: Wednesday –hiAI– is the thirteenth chapter of the game's Mizuki Route. Mizuki Okiura and Boss speak about the resolution of the Cyclops Serial Killings, and the events that transpired the previous day.

#### PSYNCIN' IN THE CAPTaiN

PSYNCIN' IN THE CAPTaiN is the fourteenth chapter of the game's Mizuki Route. The ABIS team, with assistance from Mizuki Okiura, psync into Kaname Date's dreams, in order to wake him up from his slumber.

#### sanpAI

Day 6: Wednesday –sanpAI– is the fifteenth and final chapter of the game's Mizuki Route. Kaname Date and Mizuki Okiura reflect over the entire week's events.

## Annihilation Route

This route branches from the Ota's route at PSYNCIN' IN THE VaiN.

### Day 3: Sunday

#### gumAI

Day 3: Sunday –gumAI– is the eighth chapter of the game's Annihilation Route. Kaname Date and ABIS discuss the events of Iris's Somnium, and what potential connections she (and Date) may have surrounding the killings of 6 years past.

### Day 4: Monday

#### jukkAI

Day 4: Monday –jukkAI– is the ninth chapter of the game's Annihilation Route. Kaname Date investigates the third murder(s), broadcasted early morning live by the "Bloody Polar Bear," as he scours for leads on the culprit and connections to Shoko Nadami, and learns of the story of a lonely assassin.

#### PSYNCIN' IN THE CURTaiN

PSYNCIN' IN THE CURTaiN is the tenth chapter of the game's Annihilation Route. Kaname Date and Pewter psync into the mind of Inmate #89, in search for a conclusion to the story of the assassin, as well as further information about the Cyclops Killings, both Original and New.

#### kikAI

Day 4: Monday –kikAI– is the eleventh chapter of the game's Annihilation Route. Kaname Date investigates into Boss's whereabouts, following the new information learned in #89's Somnium. This chapter concludes in a LOCKED ending until the second LOCK within Resolution Route is reached.

### Day 5: Tuesday

#### jinnAI

Day 5: Tuesday –jinnAI– is the twelfth chapter of the game's Annihilation Route, available only after reaching the second LOCK within the Resolution Route. Kaname Date pursues Boss's whereabouts, following new evidence procured that may point towards the true Cyclops Killer.

#### PSYNCIN' IN THE REFRaiN

PSYNCIN' IN THE REFRaiN is the thirteenth chapter of the game's Annihilation Route. Kaname Date and Pewter psync into Boss's mind, in order to uncover her true connections to the Cyclops Killer.

#### ihAI

Day 5: Tuesday –ihAI– is the fourteenth and final chapter of the game's Annihilation Route. Kaname Date interrogates the true culprit of the Cyclops Killings, learning the truth of all the murders.

## Iris Route

This route branches from Ota's route at PSYNCIN' IN THE PaiN.

### Day 2: Saturday

#### keitAI

Day 2: Saturday –meikAI– is the fifth chapter of the game's B branch, which includes the Iris Route and Resolution Route. Kaname Date reinvestigates Bloom Park following a new lead obtained in Somnium, as well as ensuring Iris Sagan's safety over some of his concerns.

### Day 3: Sunday

#### gyoukAI

Day 3: Sunday –gyoukAI– is the sixth chapter of the game's B branch. Kaname Date investigates further into the murder of Shoko Nadami, along with the disappearance of Renju Okiura and a mysterious occurrence at 2 AM during Iris Sagan's livestream.

#### PSYNCIN' IN THE VILLaiN

PSYNCIN' IN THE VILLaiN is the seventh chapter of the game's B branch. Kaname Date and ABIS psync into the mind of So Sejima, investigating Date's suspicions in his involvement on the newly-discovered second victim for this case, and his ties to the first victim, Shoko Nadami.

#### kyuusAI

Day 3: Sunday –kyuusAI– is the eighth chapter of the game's B branch. Kaname Date follows-up with the police's First Response team over the investigation of the second victim.

### Day 4: Monday

#### syuurAI

Day 4: Monday –syuurAI– is the ninth chapter of the game's B branch. During the day, Kaname Date investigates the two murders as he follows up on potential leads and a strange world-changing phenomenon. During the evening, Kaname Date and Iris Sagan investigate together for potential sightings of Renju Okiura, as part of their "date," while also looking into more information on the second murder.

#### PSYNCIN' IN THE MaiN: 1

PSYNCIN' IN THE MaiN: 1 is the tenth chapter of the game's B branch. Kaname Date psyncs into the mind of Iris Sagan in order to determine whether her testimony is true or false, and to determine if her life is truly in danger. This Somnium Branches in two, leading to either the chapter –irAI– in Branch A (Iris Route) or the chapter –kenzAI– in Branch B (Resolution Route).

#### irAI

Day 4: Monday –irAI– is the eleventh chapter of the game's Iris Route. Believing in her testimony, Kaname Date discusses with Iris Sagan about the events that had transpired.

### Day 5: Tuesday

#### dakkAI

Day 5: Tuesday –dakkAI– is the twelfth chapter of the game's Iris Route. Kaname Date and Iris Sagan investigate further into Renju Okiura, as well as the elusive Secret Society NAIXATLOZ and their nefarious plans.

#### PSYNCIN' IN THE MaiN: 2

PSYNCIN' IN THE MaiN: 2 is the thirteenth chapter of the game's Iris Route. Kaname Date psyncs into the mind of Iris Sagan once again, in the desperate attempt to save her life.

### Day 6: Wednesday

#### kekkAI

Day 6: Wednesday –kekkAI– is the fourteenth and final chapter of the game's Iris Route. Kaname Date and Iris Sagan have a discussion together about their time spent together the past week.

## Resolution Route

This route branches from Iris's route at PSYNCIN' IN THE MaiN: 1.

### Day 5: Tuesday

#### kenzAI

Day 5: Tuesday –kenzAI– is the eleventh chapter of the game's Resolution Route. Not believing in Iris's testimony, Kaname Date investigates further into the idol's past, and investigates a sudden disappearance. This chapter concludes in a LOCKED ending until the Ota END, Mizuki END, and Iris END are reached.

#### jutAI

Day 5: Tuesday –kenzAI– is the twelfth chapter of the game's Resolution Route, available only after clearing the Ota END, Mizuki END, and Iris END. With a victim discovered, Kaname Date investigates further into the identity of the mysterious "Alice," and uncovering the truth of an incident from 18 years prior.

#### PSYNCIN' IN THE MOUNTaiN

PSYNCIN' IN THE MOUNTaiN is the thirteenth chapter of the game's Resolution Route. Kaname Date and ABIS psync into the mind of Hitomi Sagan, in order to learn the truth about a past incident from her younger days.

#### kokkAI

Day 5: Tuesday –kokkAI– is the fourteenth chapter of the game's Resolution Route. Kaname Date questions Hitomi Sagan, where she recounts the true events of her past. This chapter concludes in a LOCKED ending until the Annihilation END is reached.

### Day 6: Wednesday

#### sousAI

Day 6: Wednesday –sousAI– is the fifteenth chapter of the game's Resolution Route, available only after reaching the Annihilation END. Kaname Date is questioned by the true culprit of the cases, as the truth of the murders are revealed.

#### PSYNCIN' IN THE CHaiN

PSYNCIN' IN THE CHaiN is the sixteenth chapter of the game's Resolution Route. The true culprit psyncs into the mind of Kaname Date himself, diving into his consciousness as the two learn about Date's past.

#### hakAI

Day 6: Wednesday –hakAI– is the seventeenth chapter of the game's Resolution Route. With his memories restored, Kaname Date and the true culprit face against each other, with the lives of two individuals hanging in the balance.

### Three Months Later

#### kassAI

Three Months Later –kassAI– is the eighteenth and final chapter of the game's Resolution Route, and the final chapter of the entire story. Three months after the story's resolution, in February, Kaname Date and his old-time friend meets with all the people in the story who remain, checking up on everyone and receiving closure to the story.

## Trivia

* In the game's achievement list, and within the game files themselves as well, the routes are organized as Ota Route -> Mizuki Route -> Annihilation Route -> Iris Route -> Resolution Route. This is most likely done in order to follow the game's flowchart and its similar assets across the game files. However, the Iris Route must be cleared before access to the Annihilation Route can be obtained in any way.
* The name of the Somnia are references to the 1929 song, and the 1952 film it inspired, named "Singin' in the Rain." The word "singin'" is swapped for "psyncin'" (with one exception swapping it for "sinkin'"), the last word is replaced with a rhyme to "rain," and all the letters are capitalized except for the "ai" vowel pair at the end of the phrase.
	+ The main soundtrack for the game, REVERIES IN THE RaiN, keeps the word "rain" at the end, while switching "Singin'" for "Reveries."

## Navigation

Hitomi Sagan • Mayumi Matsushita • Renju Okiura • Mama • Shoko Nadami • So Sejima • Moma Kumakura • Rohan Kumakura • Cyclops Serial Killer