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AI: THE SOMNIUM FILES

7 years ago

AI: THE SOMNIUM FILES is a detective adventure from Spike Chunsoft. As detective Kaname Date, you investigate a mysterious murder case in near-future Tokyo, question suspects and dive into their dreams to uncover hidden clues.

Developer
Spike Chunsoft
Publisher
Spike Chunsoft Co., Ltd.
Genre
Adventure, Rätsel, Visual Novel
Game modes
Singleplayer
Game series
AI: THE SOMNIUM FILES
Steam user reviews
91 % positive · 9,431 reviews
At Steam
View store page
On this page 17 sections

What is AI: THE SOMNIUM FILES?

AI: THE SOMNIUM FILES is a detective adventure by Spike Chunsoft. In a futuristic Tokyo, police officer Kaname Date investigates a murder case in which a woman had an eye removed. Together with the artificial intelligence Aiba, he follows traces at the crime scene, questions suspects and explores their dreams.

The story combines criminal investigations with mysterious dream worlds. Decisions made while solving the puzzles open different story paths and lead to multiple endings.

Updated 03.11.2026

Sources

Release

7 years ago

AI: THE SOMNIUM FILES was released on Sep 17, 2019 for PC and digitally in North America for PlayStation 4 and Nintendo Switch. The Japanese console versions followed on Sep 19, 2019, and the European editions for PS4 and Switch on Sep 20, 2019.

On Sep 30, 2021, a version for Xbox One was also released.

  1. PC

    Released Sep 17, 2019.

    Source
  2. PS4

    Released Sep 19, 2019 in Japan, Sep 20 in Europe.

    Source
  3. Switch

    Released Sep 20, 2019 in Europe.

    Source
  4. Xbox One

    Released Sep 30, 2021.

    Source

Updated 03.11.2026

Sources

Platforms

The detective adventure was released natively for PC, PlayStation 4, Nintendo Switch and Xbox One. The PS4 version can also be played on PS5 via backward compatibility. The Xbox One version is also playable on Xbox Series X|S. This does not create separate native PS5 or Xbox Series versions.

On Nintendo Switch, handheld, tabletop and TV modes as well as the Pro Controller are available.

Updated 03.11.2026

Sources

Gameplay

The investigation alternates between two styles of play. In the real world, Date searches locations, talks to witnesses and uses special visual functions of his artificial eye. Through a technical connection he dives into the dreams of people, to find clues that can't be figured out in an interrogation.

In the dream sections, objects and characters are linked together in unusual ways. The choice of actions changes the path through the dream.

Updated 03.11.2026

Sources

Trailer

System requirements

The Steam version requires at least an Intel Core i7-3770 at 3.4 GHz, 4 GB RAM, an NVIDIA GeForce GTX 460 with 2 GB video memory, DirectX 11 and 20 GB of free storage. The original Windows requirement is older than the requirements now in force for the Steam client, which needs Windows 10 or newer.

The details apply to PC.

Minimum

Operating system
64-bit Windows, current Steam client from Windows 10
Processor
Intel Core i7-3770 at 3.4 GHz
RAM
4 GB RAM
Graphics
NVIDIA GeForce GTX 460, 2 GB VRAM
DirectX
Version 11
Storage
20 GB

Editorial details

Updated 03.11.2026

Sources

Somnium puzzles with six minutes of time

In each Somnium, Date has a six-minute window to decode the dream world. Actions and paths use up time. Whoever recognizes the right connections first gets to new memories and information.

The dream worlds don't follow everyday logic. That's why it's not only about quick reactions, but above all about understanding the rules of each environment.

Updated 03.11.2026

Sources

Kaname Date and Aiba

Kaname Date works as an investigator for the Advanced Brain Investigation Squad (ABIS). His left eye was replaced by a prosthesis, in which the artificial intelligence Aiba lives. She helps him analyze traces and accompanies him into the dream worlds.

In the Somnia, Aiba takes on human form. This perspective shapes many puzzles, because Date and Aiba take on different roles within the investigation.

Updated 03.11.2026

Sources
Iris Sagan in a scene from the detective adventure AI: THE SOMNIUM FILES
· Spike Chunsoft Image source

The main characters

The cast includes Date's superior Boss, the technician Pewter and the young internet personality Iris Sagan. Mizuki Okiura, Iris' mother Hitomi and Ota Matsushita also play a role in the investigation. Conversations and relationships between the characters determine which clues Date receives.

Updated 03.11.2026

Sources

Interrogations and special visual modes

Date can question suspects and examine crime scenes using three special visual functions. Classic detective work and the abilities of his artificial eye complement each other. The results of the investigation lead to new conversation options and further dream sequences.

Updated 03.11.2026

Sources

Branching story and multiple endings

AI: THE SOMNIUM FILES is more than a straightforward criminal case. Depending on how the dream puzzles are solved, the story branches. Different routes show further perspectives on characters and events. Only the interplay of these storylines makes the bigger puzzle make sense.

Updated 03.11.2026

Sources

Script and character design

The story comes from Kotaro Uchikoshi, who previously helped shape the Zero Escape games, among others. Yusuke Kozaki handled the character design. Both influences show in the branching puzzles, the shifting tones and the distinctive character portraits.

Updated 03.11.2026

Sources

Single player and demo

AI: THE SOMNIUM FILES is a purely single-player adventure. The Nintendo Switch version supports TV, tabletop and handheld modes. A demo is also available on Nintendo Switch, so you can try out the first investigations.

Updated 03.11.2026

Sources

Languages and voice acting

The game features English and Japanese voice acting, and on-screen text in English, Japanese and traditional Chinese. A German text version is not included.

Updated 03.11.2026

Sources

Similar games

More from Spike Chunsoft

Game series

The first game was followed by AI: THE SOMNIUM FILES – nirvanA Initiative. Both combine investigations with diving into suspects' dreams. The games belong to the same series but tell different criminal cases.

More from AI: THE SOMNIUM FILES

Updated 03.11.2026

Sources
Cover art by AI: THE SOMNIUM FILES featuring characters in front of a glowing circular background
· Spike Chunsoft Image source
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