Psycho-Sleuth Walkthrough
Follow investigation, debate, and reconstruction in order. Press R to show investigation hotspots. Save before a branch; a player report says saving is unavailable while the choice is on screen.
Chapters 1–3 compare the English walkthrough with Chinese guides. Chapters 4–5 translate the Chinese player compilations listed below. Copied English walkthroughs count as one source line.
Chapter 1
The cremator room is the tutorial lock. I treat the first sweep as four left-hand objects, then conversations with Kizuna, Lena, and the acting priest, then the furnace itself, then four objects on the right. The second sweep is only the right side: a strand of hair that may be Lena's, Kizuna's bloodied mask, and bones on the floor. The third sweep is the clock, the priest's account of Kizuna's past, bones inside the furnace, a life detector that now reads three, and a knob that will not turn.
Debate one rejects the claim that only the priest and Lyle were present. Show the detector reading three. The quiz says the detector read four when Lyle entered, Hyper's two-victim theory fails, the mask plus ash can be a blunt weapon, and the drop from four to three means a living person is still hidden. That hiding place is the furnace, including the cavity under the plate. Debate two answers the heat objection with a six-hour coma: the furnace has cooled. Debate three answers "burned to death" with the bloody knife and Lena's unbloodied clothes. Debate four says someone else is here because the detector stays at three, the left side of the room changed, and Kizuna's power is involved. Debate five answers "I never touched the scene" with bones only on the right, the knob on the left, and Lena as the one who started the furnace.
The bad branch is turning the furnace on immediately. That is Lena's death. Waiting until the culprit is named continues the chapter and leads to the clear achievement whose Chinese title matches the chapter, 我是凶手. Reconstruction cards cited by two independent lines are slide II for Lyle being held, IV for the body and clothes entering the furnace, VI for the confession line, VII for knife, body, and mask, and VIII for Kizuna using her power. The victim's name is not stable across sources, so this page leaves it blank.
Chapter 2
Chapter two moves out of the furnace and into the offering chamber, the infirmary, the dining room, and the lounge. Silas, Eirys, Dada, Raze, Hyper, Fayse, Alice, Elian, a believer, Cotari, and the acting priest are the people the English notes place on stage. The menu gains a disorder page. Twenty affliction entries are mentioned, while only thirteen participants exist, so some entries stay unused. I do not invent the missing names.
Fayse's role question has no single correct pick. Protecting Lena means admitting the brave role. The first offering sweep covers the door, a USB stick, Luke's photo, costumes, a bank knife, a creased note, a feather, a chest, and the sea-angel tank, plus talks with Eirys, the believer, and Fayse. The infirmary sweep covers the door, a wire saw on the bed, the murder mark, a clock, the sea-angel box, and the priest.
The trick is entry during the dismemberment power: the culprit hides in the room and blends back into the crowd. The missing parts are Cotari's legs. A second offering sweep checks Cotari's marks, the severed limbs, the tallow box and the mark under its lid, the tallow lid, the believer, and the clock. The second infirmary sweep checks floor blood, Cotari's legs and hands, bandages, the clock, and the sea-angel box. The wire saw is the tool, not a nano blade, because there is not enough time. Tallow lids pin the hands, bandages reattach the legs, and the sea-angel pattern tags Cotari's legs. Raze is named as the culprit by three Chinese player writeups. Calling Alice the culprit during the trial, or refusing at the last choice, ends the run with no achievement. Clearing the trial is the chapter achievement 四肢切斷. A Bahamut post says the last two reconstruction cards hint the wrong order. I keep that as a player report.
Chapter 3
Chapter three is the last chapter the long English pages actually walk. The map is the lounge, the priest's room, the art studio, the archive, and Silas's bedroom. After the werewolf kill, skipping the death announcement would cause trouble, so the notes use the seer privilege and let Fayse lead the group.
In the lounge Silas says the priest does not fear death because the selection continues anyway. Fayse thinks the person most likely to be her father is Silas. Hyper suggests the priest may be faking death. The priest's room holds Lena, Dada, a hanging copy of clothes, Fayse, a bust behind Fayse, a sea-angel crown you see by looking up, the believer, and the priest. The studio holds a door, the believer, a rear-wall painting, a sea-angel lamp, a hanging picture, a saw handle, and a plaster bucket. Fayse feels sick because faces are everywhere. The priest's self-portraits differ, which the notes read as a shapeshift. The archive holds a terminal, a locker marked with an unknown X, Kizuna's locker, and Lena.
The second studio visit shows a charred head, a broken skylight, a sea-angel mark, a corpse, shards before a statue, and a respirator. Silas is hung upside down on the idol. The dead person is Silas. Fayse is the werewolf. Alice is the accomplice who changes form. The same killing is staged three times. Special plaster heats when it meets water and burns Silas. Calling the trial early is the bad end titled 悖論恆存. Refusing to let Fayse leave is a game over with no achievement. The question that proves someone can change form is marked uncertain by both English pages, which tentatively pick Raze. I copy that uncertainty instead of promoting it. Click spots for the three scratches differ between writeups, so I only say the noise patch on the left of the frame labeled with this chapter's power.
Chapter 4
No long English walkthrough reaches chapter four. Everything below is compiled from Taiwanese and Simplified Chinese player notes, then checked across those notes. The stage is three goddesses: past, present, and future, reached by a time journey that exposes the rider's past. The Lena in front of Lyle is a cult believer wearing Lena's face and Lena's old memories. The priest is not among the surviving god-seeds. Elian's past has already been replaced by another person entirely.
The memory power in play is Hyper's total recall. Player notes say Lyle's missing memory of the director comes from the director's own power. The killer copies a murder from Lyle's past. Inside the past goddess, Alice is killed by someone else, and that someone is Dada. The trial chain runs through collusion with the past Lyle and the time-temple rule, a return from the future that exposes Hyper first, Dada's ability to make a demonic beast, beasts that used to be human, a headcount change at the present goddess, Dada becoming Alice, and Alice being the acting priest. Dada and Alice are the same person. The killer needs Alice to look like a corpse. The accomplices named together are Hyper, Alice, and Dada.
Killing Lena and Eirys on the first ride to the past goddess is the bad end 摯愛之死. Abandoning Eirys during the recollection is 莫瞳之死. Finishing the trial is the chapter clear 完全記憶. One guide writes the reconstruction card order as 21354. That digit string has a single source, so I refuse to print it as the only solution.
Chapter 5
Chapter five is the last case and also the door to the true ending, but the epilogue lives on the endings page. The rooms named by Chinese guides are the audience hall, a glass room, and a neuron road. The cult's real leader is a believer. Brain data of the dead passes into believers through resonance. The god of reason wants the cast to understand the world the cult is chasing.
Answers that two guides share: the brains in the room belong to dead god-seeds, the thing to destroy is the sea angel, there are nine nano vibration knives, and the person who was not revived is Lena. Day one says the werewolf kills only in daylight, and the scene shows three powers at once: dismemberment, face erasure, and beast delusion. Day two says the glass room is not a locked room; the Alice who is accused is not the real Alice, who is in the priest's room. Day three says everyone is already dead, the god of reason and the werewolf act at night, Fayse is missing, and face erasure must be sealed.
The full trial chain exists in one guide only: close the eyes, the glass room, the death order, the charred head, the priest, the beast is the priest, beast delusion, the neck cross-section, the chair back, the seal order, the projector, the missing knife. I list that chain as a single-source reading. The glass-room murder is not the first. The priest cut off Kizuna's hands so the corpse would match the priest. The culprit is the god of reason. Quitting early is the bad end 理之神統治 with no achievement, according to one forum thread. Finishing the trial and choosing to persist is the clear achievement 理解一切.
FAQ
Where is the English chapter 4 guide?
There isn’t an independent English one. This page says so and cites the Chinese notes.
Sources
- TreyexGaming walkthrough（第 1–3 章） · 2026-11-12
- 水御宅 全五章攻略 · 2026-11-12
- Steam 指南 SASA 全流程 · 2026-11-12
- 巴哈姆特 分歧與 BE 整理 · 2026-11-12
- note 千晴 通關記錄 · 2026-11-12