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Games like AI: The Somnium Files | IndieDex

AI: The Somnium Files
Games like AI: The Somnium Files

Find the Steam hidden gems

single-players with secrets you find without a guideor

Games like AI: The Somnium Files

A ~25-hour sci-fi detective adventure in neo-noir Tokyo, with a twist-heavy story and humor that some find juvenile.

The 25th Ward: The Silver Case
A single-player crime adventure in Kanto where detective Tokio Morishima unravels a seemingly random murder web; reviewers call it a mind-boggling narrative lasting roughly 13-18 hours.
2018-03-13
- Puzzle

Adventure

Text

Mystery

Visual Novel

Master Detective Archives: RAIN CODE Plus cover art

Master Detective Archives: RAIN CODE Plus

A long, Danganronpa-style mystery adventure where an amnesiac detective and his ghost partner investigate unsolved cases.

2024-07-17

Action
Science fiction
Adventure
Fantasy
Third person
Mystery

ANONYMOUS;CODE cover art

ANONYMOUS;CODE

A single-player sci-fi adventure where hacking and time travel lead to a divine confrontation, with a plot-driven but character-shallow story lasting around 18 hours.

2023-09-08

Science fiction
Adventure
Text
Mystery
Visual Novel

428: Shibuya Scramble cover art

428: Shibuya Scramble

A live-action Shibuya-set adventure with five interwoven protagonists, a kidnapping conspiracy, and multiple endings—funny, emotional, and roughly 30-35 hours long.

2018-09-04

Adventure
Text
Mystery
Drama
Visual Novel

The Shell Part II: Purgatorio cover art

The Shell Part II: Purgatorio

A long 1950s detective visual novel: Reiji Tokisaka investigates a centuries-spanning cult mystery with branching routes, body horror, and a slow, intricate narrative of roughly 50-60 hours.

2024-04-18

Thriller
Adventure
Horror
Simulator
Text
Mystery
Point-and-click
Drama
Visual Novel

AI: THE SOMNIUM FILES - nirvanA Initiative cover art

AI: THE SOMNIUM FILES - nirvanA Initiative

A roughly 26-hour single-player anime detective adventure where agents and their AI partners tackle a bizarre serial-killing case through investigation and reworked logic-puzzle dream sequences, though some reviewers flag uncomfortable sexualized content.

2022-06-24

Action
First person
Science fiction
Puzzle
Adventure
Third person
Mystery
Visual Novel

BUSTAFELLOWS cover art

BUSTAFELLOWS

A noir otome visual novel mixing murder mystery with romance and time travel, featuring a female protagonist and well-written routes across a roughly 25-hour story.

2021-07-30

First person
Thriller
Text
Mystery
Romance
Visual Novel

Tales of the Neon Sea cover art

Tales of the Neon Sea

A pixel-art noir mystery in a neon city of humans, robots, and gangster cats, with investigation and puzzles spanning roughly 26 hours.

2019-04-29

Science fiction
Puzzle
Adventure
Indie
Side view
Role-playing (RPG)
Arcade
Point-and-click

ROBOTICS;NOTES ELITE cover art

ROBOTICS;NOTES ELITE

A lengthy sci-fi adventure about a high school robot club and augmented reality on Tanegashima, with a slow, psychological story.

2020-10-13

First person
Science fiction
Adventure
Visual Novel

Spirit Hunter: Death Mark II cover art

Spirit Hunter: Death Mark II

A suspense-horror adventure set at a Tokyo academy, where you investigate supernatural cases and make timed choices, with reviewers noting filler content and a confined setting.

2024-02-15

First person
Thriller
Adventure
Horror
Side view
Mystery
Visual Novel

Beyond a Steel Sky cover art

Beyond a Steel Sky

A single-player, cyberpunk adventure thriller about hacking systems and solving conspiracies in an AI-driven dystopia, with reviewer-reported playtime around 10–12.5 hours.

2020-07-16

Action
Science fiction
Puzzle
Thriller
Adventure
Third person
Indie

DRAMAtical Murder cover art

DRAMAtical Murder

A single-player, choice-driven cyberpunk adventure of VR battles and gang turf wars, where dark secrets lurk beneath a glossy city—though the Steam port's censoring cuts story content.

2021-04-06