The Game Census
AI: The Somnium Files cover art

AI: The Somnium Files

Spike Chunsoft Co., Ltd. · 2019-09-17

SteamPlayStation StoreAmazonMicrosoft Store

Adventure

Modes: Single player

Releases: Sep 30, 2021 (Xbox One), Sep 19, 2019 (Nintendo Switch), Sep 20, 2019 (PlayStation 4), Sep 17, 2019 (PC (Microsoft Windows))

Play as detective Kaname Date on the case of an elusive serial killer in this thrilling, sci-fi murder mystery.

32
playing now
92%
positive of 9.4k reviews
Very Positive
steam rating
200,000–500,000
owners (SteamSpy est.)
1,376
twitch viewers (latest)
86/100
critic score (2 outlets, IGDB)
84/100
IGDB user rating (118 ratings)
22h
to beat · rushed 19h · completionist 25h
platinum
deck/linux tier (ProtonDB)
$19.99
steam price (US)

32 players in-game as of 2026-08-30 02:00 UTC (census sample)

AI: The Somnium Files is a 2019 visual novel adventure video game developed and published by Spike Chunsoft. Set in near-future Tokyo, the story follows Kaname Date, a detective who investigates a string of serial killings by entering suspects' memories to extract information. Gameplay is split into two sections: first-person visual novel segments and third-person exploration. The plot progresses via branching routes, leading to multiple endings depending on choices made by the player.

Health check

Healthy
  • · 32 players in-game at the last census sample.
  • · 464 reviews in the last 8 weeks (~58/week).
  • · Review velocity down 31% vs the prior 8 weeks.
  • · Top 8% of 11,404 Adventure games in the census by review count.

Health tier since 2026-08-28

Estimated sales: 235k–563k copies

Review-multiple estimate from 9,380 total reviews — how this is computed.

Current store prices

lowest across shops (ITAD)$3.99-80%
Microsoft Store$3.99-80%

Deal snapshots via CheapShark, refreshed daily.

All-time low: $3.99 at Steam (2025-01-16)via IsThereAnyDeal

12-month high $19.99 · on sale 10 of 19 observed days · at its all-time low (census price snapshots)

Review momentum

PositiveNegative
43643620192026Week of 2019-09-01: 436 positiveWeek of 2019-09-01: 38 negativeWeek of 2019-10-01: 246 positiveWeek of 2019-10-01: 14 negativeWeek of 2019-11-01: 260 positiveWeek of 2019-11-01: 9 negativeWeek of 2019-12-01: 177 positiveWeek of 2019-12-01: 10 negativeWeek of 2020-01-01: 199 positiveWeek of 2020-01-01: 14 negativeWeek of 2020-02-01: 123 positiveWeek of 2020-02-01: 12 negativeWeek of 2020-03-01: 204 positiveWeek of 2020-03-01: 16 negativeWeek of 2020-04-01: 63 positiveWeek of 2020-04-01: 7 negativeWeek of 2020-05-01: 165 positiveWeek of 2020-05-01: 9 negativeWeek of 2020-06-01: 76 positiveWeek of 2020-06-01: 9 negativeWeek of 2020-07-01: 192 positiveWeek of 2020-07-01: 16 negativeWeek of 2020-08-01: 138 positiveWeek of 2020-08-01: 18 negativeWeek of 2020-09-01: 99 positiveWeek of 2020-09-01: 10 negativeWeek of 2020-10-01: 52 positiveWeek of 2020-10-01: 6 negativeWeek of 2020-11-01: 127 positiveWeek of 2020-11-01: 10 negativeWeek of 2020-12-01: 100 positiveWeek of 2020-12-01: 15 negativeWeek of 2021-01-01: 102 positiveWeek of 2021-01-01: 13 negativeWeek of 2021-02-01: 71 positiveWeek of 2021-02-01: 10 negativeWeek of 2021-03-01: 50 positiveWeek of 2021-03-01: 8 negativeWeek of 2021-04-01: 33 positiveWeek of 2021-04-01: 6 negativeWeek of 2021-05-01: 94 positiveWeek of 2021-05-01: 10 negativeWeek of 2021-06-01: 58 positiveWeek of 2021-06-01: 3 negativeWeek of 2021-07-01: 189 positiveWeek of 2021-07-01: 14 negativeWeek of 2021-08-01: 65 positiveWeek of 2021-08-01: 2 negativeWeek of 2021-09-01: 85 positiveWeek of 2021-09-01: 8 negativeWeek of 2021-10-01: 125 positiveWeek of 2021-10-01: 10 negativeWeek of 2021-11-01: 83 positiveWeek of 2021-11-01: 10 negativeWeek of 2021-12-01: 97 positiveWeek of 2021-12-01: 5 negativeWeek of 2022-01-01: 81 positiveWeek of 2022-01-01: 9 negativeWeek of 2022-02-01: 79 positiveWeek of 2022-02-01: 13 negativeWeek of 2022-03-01: 51 positiveWeek of 2022-03-01: 3 negativeWeek of 2022-04-01: 44 positiveWeek of 2022-04-01: 1 negativeWeek of 2022-05-01: 196 positiveWeek of 2022-05-01: 24 negativeWeek of 2022-06-01: 186 positiveWeek of 2022-06-01: 14 negativeWeek of 2022-07-01: 335 positiveWeek of 2022-07-01: 23 negativeWeek of 2022-08-01: 123 positiveWeek of 2022-08-01: 10 negativeWeek of 2022-09-01: 122 positiveWeek of 2022-09-01: 14 negativeWeek of 2022-10-01: 103 positiveWeek of 2022-10-01: 14 negativeWeek of 2022-11-01: 112 positiveWeek of 2022-11-01: 15 negativeWeek of 2022-12-01: 107 positiveWeek of 2022-12-01: 13 negativeWeek of 2023-01-01: 106 positiveWeek of 2023-01-01: 14 negativeWeek of 2023-02-01: 136 positiveWeek of 2023-02-01: 16 negativeWeek of 2023-03-01: 139 positiveWeek of 2023-03-01: 25 negativeWeek of 2023-04-01: 64 positiveWeek of 2023-04-01: 5 negativeWeek of 2023-05-01: 60 positiveWeek of 2023-05-01: 9 negativeWeek of 2023-06-01: 51 positiveWeek of 2023-06-01: 17 negativeWeek of 2023-07-01: 128 positiveWeek of 2023-07-01: 7 negativeWeek of 2023-08-01: 104 positiveWeek of 2023-08-01: 15 negativeWeek of 2023-09-01: 52 positiveWeek of 2023-09-01: 3 negativeWeek of 2023-10-01: 57 positiveWeek of 2023-10-01: 5 negativeWeek of 2023-11-01: 76 positiveWeek of 2023-11-01: 7 negativeWeek of 2023-12-01: 99 positiveWeek of 2023-12-01: 7 negativeWeek of 2024-01-01: 93 positiveWeek of 2024-01-01: 12 negativeWeek of 2024-02-01: 51 positiveWeek of 2024-02-01: 4 negativeWeek of 2024-03-01: 92 positiveWeek of 2024-03-01: 12 negativeWeek of 2024-04-01: 40 positiveWeek of 2024-04-01: 10 negativeWeek of 2024-05-01: 57 positiveWeek of 2024-05-01: 8 negativeWeek of 2024-06-01: 59 positiveWeek of 2024-06-01: 6 negativeWeek of 2024-07-01: 60 positiveWeek of 2024-07-01: 5 negativeWeek of 2024-08-01: 42 positiveWeek of 2024-08-01: 2 negativeWeek of 2024-09-01: 43 positiveWeek of 2024-09-01: 3 negativeWeek of 2024-10-01: 55 positiveWeek of 2024-10-01: 3 negativeWeek of 2024-11-01: 87 positiveWeek of 2024-11-01: 11 negativeWeek of 2024-12-01: 52 positiveWeek of 2024-12-01: 7 negativeWeek of 2025-01-01: 110 positiveWeek of 2025-01-01: 11 negativeWeek of 2025-02-01: 103 positiveWeek of 2025-02-01: 10 negativeWeek of 2025-03-01: 106 positiveWeek of 2025-03-01: 11 negativeWeek of 2025-04-01: 61 positiveWeek of 2025-04-01: 7 negativeWeek of 2025-05-01: 74 positiveWeek of 2025-05-01: 9 negativeWeek of 2025-06-01: 70 positiveWeek of 2025-06-01: 5 negativeWeek of 2025-07-01: 101 positiveWeek of 2025-07-01: 15 negativeWeek of 2025-08-01: 96 positiveWeek of 2025-08-01: 10 negativeWeek of 2025-09-01: 62 positiveWeek of 2025-09-01: 6 negativeWeek of 2025-10-01: 78 positiveWeek of 2025-10-01: 9 negativeWeek of 2025-11-01: 60 positiveWeek of 2025-11-01: 6 negativeWeek of 2025-12-01: 50 positiveWeek of 2025-12-01: 5 negativeWeek of 2026-01-01: 71 positiveWeek of 2026-01-01: 10 negativeWeek of 2026-02-01: 41 positiveWeek of 2026-02-01: 4 negativeWeek of 2026-03-01: 54 positiveWeek of 2026-03-01: 7 negativeWeek of 2026-04-01: 48 positiveWeek of 2026-04-01: 1 negativeWeek of 2026-05-01: 54 positiveWeek of 2026-05-01: 3 negativeWeek of 2026-06-01: 53 positiveWeek of 2026-06-01: 7 negativeWeek of 2026-07-01: 45 positiveWeek of 2026-07-01: 11 negativeWeek of 2026-08-01: 40 positiveWeek of 2026-08-01: 6 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

5202026-08-07 00:00 — 24 players2026-08-07 08:00 — 32 players2026-08-07 16:00 — 37 players2026-08-08 00:00 — 32 players2026-08-08 08:00 — 30 players2026-08-08 16:00 — 52 players2026-08-09 00:00 — 39 players2026-08-09 08:00 — 41 players2026-08-09 16:00 — 43 players2026-08-10 00:00 — 35 players2026-08-10 08:00 — 26 players2026-08-10 16:00 — 24 players2026-08-11 00:00 — 0 players2026-08-11 08:00 — 26 players2026-08-11 16:00 — 28 players2026-08-13 00:00 — 28 players2026-08-14 07:00 — 22 players2026-08-15 15:00 — 37 players2026-08-16 23:00 — 33 players2026-08-18 07:00 — 25 players2026-08-19 14:00 — 35 players2026-08-20 22:00 — 22 players2026-08-22 05:00 — 25 players2026-08-23 13:00 — 38 players2026-08-24 20:00 — 29 players2026-08-26 04:00 — 23 players2026-08-27 13:00 — 32 players2026-08-28 19:00 — 31 players2026-08-30 02:00 — 32 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$59.99$3.992019-11-102026-08-282019-11-10 — best price $41.992020-01-02 — best price $59.992020-03-03 — best price $29.992020-05-06 — best price $59.992020-08-18 — best price $23.992020-11-16 — best price $59.992021-02-11 — best price $23.992021-05-06 — best price $59.992021-07-26 — best price $39.992021-10-07 — best price $39.992021-11-24 — best price $15.992022-01-05 — best price $39.992022-04-28 — best price $7.992022-07-07 — best price $39.992022-10-25 — best price $7.992022-11-29 — best price $39.992023-02-13 — best price $7.992023-02-27 — best price $39.992023-04-27 — best price $15.992023-06-30 — best price $7.992023-08-14 — best price $39.992023-11-21 — best price $7.992024-01-04 — best price $39.992024-04-25 — best price $7.992024-07-11 — best price $39.992024-10-21 — best price $5.992024-12-04 — best price $39.992025-01-16 — best price $3.992025-03-10 — best price $39.992025-04-25 — best price $7.992025-06-26 — best price $3.992025-07-26 — best price $19.992025-09-29 — best price $5.992025-11-03 — best price $19.992026-01-23 — best price $5.992026-03-26 — best price $19.992026-06-04 — best price $3.992026-07-09 — best price $19.992026-08-28 — best price $3.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

4701342026-05-31 — 201 pageviews2026-06-03 — 167 pageviews2026-06-06 — 191 pageviews2026-06-09 — 223 pageviews2026-06-12 — 188 pageviews2026-06-15 — 176 pageviews2026-06-18 — 184 pageviews2026-06-21 — 280 pageviews2026-06-24 — 161 pageviews2026-06-27 — 229 pageviews2026-06-30 — 208 pageviews2026-07-03 — 251 pageviews2026-07-06 — 258 pageviews2026-07-09 — 267 pageviews2026-07-12 — 213 pageviews2026-07-15 — 174 pageviews2026-07-18 — 171 pageviews2026-07-21 — 163 pageviews2026-07-24 — 148 pageviews2026-07-27 — 167 pageviews2026-07-30 — 145 pageviews2026-08-02 — 149 pageviews2026-08-05 — 148 pageviews2026-08-08 — 179 pageviews2026-08-11 — 175 pageviews2026-08-14 — 146 pageviews2026-08-17 — 160 pageviews2026-08-20 — 258 pageviews2026-08-23 — 206 pageviews2026-08-26 — 150 pageviews2026-08-28 — 174 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Completion

45
achievements tracked
79.4%
earned "BRaiN: Memories Hidden in Dreams"
40.7%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsSingle-playerSteam AchievementsSteam Trading CardsDualShock Controller SupportPartial Controller SupportSteam CloudRemote Play on PhoneRemote Play on TabletFamily Sharing

2 supported languages: English, Japanese

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)6,77422%45
Xbox One, Windows (Xbox)5,03122%45
PS4 (PlayStation)3,92555%45
PS4 (PlayStation)1,49773%45
Switch (Nintendo)4640%0
Switch (Nintendo)720%0
Switch (Nintendo)390%0

Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.

Player tags

GoreAnimeComedyPuzzleSci-fiMysteryViolentAdventureDetectiveStory Rich

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

Don't Knock TwiceImmortal: UnchainedOmensight: Definitive EditionPLANET ALPHAHello Neighbor: Hide and SeekBlacksad: Under the SkinDetroit: Become HumanThe Room 4: Old Sins

Similarity via IGDB.

Official site ↗Wikipedia ↗