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 · Perspectives: First person, Third person

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.

AI: The Somnium Files is a 2019 Adventure game priced at $19.99, with an estimated 200,000 to 500,000 owners and a Very Positive review sentiment (91% of 9,410 reviews).

42
playing now
91%
positive of 9.4k reviews
Very Positive
steam's rating (official)
200,000–500,000
owners (SteamSpy est.)
1,376
twitch viewers (latest)
1376.0
viewers/channel (concentration)
86/100
critic score (2 outlets, IGDB)
84/100
IGDB user rating (118 ratings)
4.63★
PlayStation Store rating (2,547 ratings)
22h
to beat · rushed 19h · completionist 25h
platinum
deck/linux tier (ProtonDB)
Playable
Steam Deck (Valve)
SteamOS: Playable
$19.99
steam price (US)

42 players in-game as of 2026-10-14 12:00 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.

Trailer

AI: The Somnium Files trailer thumbnail

AI: The Somnium Files - Release Trailer| PS4

≈194,250 YouTube results for this game's trailer search

Health check

Healthy
  • · 42 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 4% of 28,838 Adventure games in the census by review count.

Health tier since 2026-08-28

Estimated sales: 235k–565k copies

Review-multiple estimate from 9,410 total reviews — how this is computed.

Current store prices

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 22 observed days (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

75232026-09-15 13:00 — 70 players2026-09-16 21:00 — 46 players2026-09-18 05:00 — 40 players2026-09-19 12:00 — 75 players2026-09-20 20:00 — 52 players2026-09-22 04:00 — 37 players2026-09-23 11:00 — 49 players2026-09-24 19:00 — 46 players2026-09-26 02:00 — 42 players2026-09-27 10:00 — 29 players2026-09-28 17:00 — 46 players2026-09-30 01:00 — 25 players2026-10-01 08:00 — 23 players2026-10-02 16:00 — 33 players2026-10-03 23:00 — 39 players2026-10-05 07:00 — 35 players2026-10-06 15:00 — 42 players2026-10-07 22:00 — 35 players2026-10-09 06:00 — 27 players2026-10-10 13:00 — 53 players2026-10-11 21:00 — 41 players2026-10-13 05:00 — 31 players2026-10-14 12:00 — 42 players
Concurrent players, hourly average, last 30 days (census samples).
45224Sep 2019Aug 2026Sep 2019 — avg 452 · peak 983Dec 2019 — avg 66 · peak 203Mar 2020 — avg 92 · peak 340Jun 2020 — avg 52 · peak 205Sep 2020 — avg 58 · peak 118Dec 2020 — avg 57 · peak 174Mar 2021 — avg 30 · peak 65Jun 2021 — avg 38 · peak 117Sep 2021 — avg 51 · peak 229Dec 2021 — avg 52 · peak 108Mar 2022 — avg 30 · peak 56Jun 2022 — avg 152 · peak 664Sep 2022 — avg 119 · peak 399Dec 2022 — avg 78 · peak 172Mar 2023 — avg 93 · peak 226Jun 2023 — avg 41 · peak 81Sep 2023 — avg 43 · peak 84Dec 2023 — avg 58 · peak 116Mar 2024 — avg 70 · peak 169Jun 2024 — avg 36 · peak 87Sep 2024 — avg 28 · peak 49Dec 2024 — avg 41 · peak 87Mar 2025 — avg 71 · peak 147Jun 2025 — avg 45 · peak 104Sep 2025 — avg 50 · peak 106Dec 2025 — avg 39 · peak 78Mar 2026 — avg 57 · peak 125Jun 2026 — avg 56 · peak 139Aug 2026 — avg 33 · peak 74
Monthly average players (source: steamcharts.com) — history via steamcharts.com; live census sampling since Aug 2026.

Price history

$59.99$3.992019-11-102026-10-092019-11-10 — best price $41.992020-01-23 — best price $35.992020-04-30 — best price $29.992020-08-18 — best price $23.992020-12-22 — best price $23.992021-04-29 — best price $23.992021-07-26 — best price $39.992021-10-28 — best price $15.992021-12-22 — best price $15.992022-04-28 — best price $7.992022-09-15 — best price $7.992022-11-22 — best price $7.992023-02-13 — best price $7.992023-03-16 — best price $15.992023-05-09 — best price $39.992023-08-14 — best price $39.992023-11-28 — best price $39.992024-03-21 — best price $39.992024-07-11 — best price $39.992024-11-04 — best price $39.992025-01-02 — best price $39.992025-03-10 — best price $39.992025-05-09 — best price $39.992025-07-12 — best price $3.992025-09-29 — best price $5.992025-12-18 — best price $5.992026-03-09 — best price $3.992026-06-04 — best price $3.992026-08-27 — best price $3.992026-09-18 — best price $19.992026-10-09 — best price $3.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

4701382026-05-31 — 201 pageviews2026-06-04 — 184 pageviews2026-06-08 — 209 pageviews2026-06-12 — 188 pageviews2026-06-16 — 205 pageviews2026-06-20 — 164 pageviews2026-06-24 — 161 pageviews2026-06-28 — 259 pageviews2026-07-02 — 218 pageviews2026-07-06 — 258 pageviews2026-07-10 — 179 pageviews2026-07-14 — 163 pageviews2026-07-18 — 171 pageviews2026-07-22 — 144 pageviews2026-07-26 — 182 pageviews2026-07-30 — 145 pageviews2026-08-03 — 170 pageviews2026-08-07 — 192 pageviews2026-08-11 — 175 pageviews2026-08-15 — 169 pageviews2026-08-19 — 162 pageviews2026-08-23 — 206 pageviews2026-08-27 — 220 pageviews2026-08-31 — 231 pageviews2026-09-04 — 207 pageviews2026-09-08 — 203 pageviews2026-09-12 — 211 pageviews2026-09-16 — 180 pageviews2026-09-20 — 203 pageviews2026-09-24 — 144 pageviews2026-09-28 — 176 pageviews2026-10-02 — 192 pageviews2026-10-06 — 182 pageviews2026-10-09 — 138 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.

Where its players are

Share of Steam reviews by language (top languages measured) — a proxy for where the player base lives.

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 ↗