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AI: The Somnium Files
Play as detective Kaname Date on the case of an elusive serial killer in this thrilling, sci-fi murder mystery.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-02 · quoted reviews as of 2026-05-12.
What reviewers agree on
75 of the 104 reviews raise this.
“Game has some unique elements and great characters with really memorable moments. But it recycles the same 1 joke about being a porn addict over and over throughout the game with zero attempts at making any other joke.…”
“One of the best stories i've seen in a game 100% hands down. It's much more complicated than it looks on the surface and it just gets more and more deep as it goes on. Each question answered leads to more questions and…”
“I have to say that some of Somnium Investigations are my least favorite part of the game because it's not always clear what you even have to do, and they leave you little time to try because of the time limit. Also the…”
26 of the 104 reviews raise this.
“One of the best stories i've seen in a game 100% hands down. It's much more complicated than it looks on the surface and it just gets more and more deep as it goes on. Each question answered leads to more questions and…”
“i love this type of JP game that features an, albeit corny, yet very satisfying, well-rounded happy ending this game scratches a very specific itch in my mildly OCD brain: to click every object in the background,…”
“作为推理游戏来说真的很优秀。恰到好处的引导让玩家既能够体会到自己推理出诡计的快乐,又能够保留一些惊喜和反转。人物建模都很可爱,表情调整地也很到位,新垣樽助的配音也是一大享受!总之很推荐很推荐,在心灵解谜的部分,不要自己去纠结了,打不过就看看攻略好了!”
13 of the 104 reviews raise this.
“AI: The Somnium Files is an interesting game. Without spoiling anything, it’s ultimately a story about “coming home.” The game leans much closer to a pure visual novel with branching storytelling—similar to 13…”
“I really loved this game! It has many unexpected twists that really made my head turn and it has lots of funny (mostly dirty humor haha) moments! [spoiler]Date, a porn magazine! *WHERE?![/spoiler] I really recommend…”
“I enjoyed this a lot more than the Zero Escape trilogy. Unlike those games, where the story annoyed me to the point that I ended up looking up a plot summary part-way through, I was happy just letting the narrative of…”
9 of the 104 reviews raise this.
“作为推理游戏来说真的很优秀。恰到好处的引导让玩家既能够体会到自己推理出诡计的快乐,又能够保留一些惊喜和反转。人物建模都很可爱,表情调整地也很到位,新垣樽助的配音也是一大享受!总之很推荐很推荐,在心灵解谜的部分,不要自己去纠结了,打不过就看看攻略好了!”
“A mix of great characters, writing, scifi and funny voice lines. That dance number at the end delivered what i was expecting.”
“AI: The Somnium Files is an interesting game. Without spoiling anything, it’s ultimately a story about “coming home.” The game leans much closer to a pure visual novel with branching storytelling—similar to 13…”
3 of the 104 reviews raise this.
“作为推理游戏来说真的很优秀。恰到好处的引导让玩家既能够体会到自己推理出诡计的快乐,又能够保留一些惊喜和反转。人物建模都很可爱,表情调整地也很到位,新垣樽助的配音也是一大享受!总之很推荐很推荐,在心灵解谜的部分,不要自己去纠结了,打不过就看看攻略好了!”
“This game was really fun and overall I had a great time ! The story is gripping and I found every plot twists to be unexpected ! There's quite a few interesting and unique gimmicks in the gameplay that really helped…”
“So beautiful I had to play it for hours, also if you're looking to cry your heart out with your friend, highly recommend.”
14 of the 104 reviews raise this · 6 of them still recommend the game.
“Game has some unique elements and great characters with really memorable moments. But it recycles the same 1 joke about being a porn addict over and over throughout the game with zero attempts at making any other joke.…”
“I loved the zero escape series, but this one isn't it. The humour is obnoxious rather than funny, I don't like any of the characters or their design. I could believe the mystery is in fact good once you get through it,…”
“♥♥♥♥♥ its been 5 hours and she wont stop talking about her love life.... can she ♥♥♥♥♥♥♥ kill herself already?????????????”
12 of the 104 reviews raise this · 8 of them still recommend the game.
“Game has some unique elements and great characters with really memorable moments. But it recycles the same 1 joke about being a porn addict over and over throughout the game with zero attempts at making any other joke.…”
“I have to say that some of Somnium Investigations are my least favorite part of the game because it's not always clear what you even have to do, and they leave you little time to try because of the time limit. Also the…”
“I loved the zero escape series, but this one isn't it. The humour is obnoxious rather than funny, I don't like any of the characters or their design. I could believe the mystery is in fact good once you get through it,…”
5 of the 104 reviews raise this · 3 of them still recommend the game.
“♥♥♥♥♥ its been 5 hours and she wont stop talking about her love life.... can she ♥♥♥♥♥♥♥ kill herself already?????????????”
“I’ll be honest, I wasn’t feeling the first two or so hours of the game that much, but I’m so glad I pushed through. As someone who plays and watches a lot of mystery stuff, this was both one of the most engaging and…”
“Goated sc fi mystery with great plot twists and reveals I dont really like the flowchart because one route has a pretty ♥♥♥♥ ending, but thats such a minor nitpick to a really well crafted story. This game is probably…”
3 of the 104 reviews raise this · 2 of them still recommend the game.
“作为推理游戏来说真的很优秀。恰到好处的引导让玩家既能够体会到自己推理出诡计的快乐,又能够保留一些惊喜和反转。人物建模都很可爱,表情调整地也很到位,新垣樽助的配音也是一大享受!总之很推荐很推荐,在心灵解谜的部分,不要自己去纠结了,打不过就看看攻略好了!”
“A friend told me I'd probably enjoy this game and I did. I have always liked the more interactive visual novels, like Danganronpa. The Somnium stuff was pretty cool, although some of them could be a little tough. My…”
3 of the 104 reviews raise this · 2 of them still recommend the game.
“will forever adore this game. and will, unfortunately, forever remember kaname date as the guy who haunts my daydreams with the worst remembrance of the dumbest line deliveries of my entire life”
“I’ll be honest, I wasn’t feeling the first two or so hours of the game that much, but I’m so glad I pushed through. As someone who plays and watches a lot of mystery stuff, this was both one of the most engaging and…”
“uhhhhhhhhhhhhhhhhhhhhhhhhhhh if it's on sale you can get it, but the story is not great, the voice acting is diabolical (in english) and the singing oh my god...... the singing.................... Also, the gameplay is…”
Counted across 104 English reviews, sampled to match this game's 91.5% positive rating · as of 2026-05-12
“I learned Japanese by going into this game cold, looking up everything everyone said, and then adding each new kanji I saw into Ringotan which tests you on handwriting them from memory. I can now handwrite some 3000 kanji from memory, and comprehend an extremely high amount of…”
— a player, Steam review · 93 hrs played“I feel like I have a good chunk of visual novels under my roster but I cannot believe that I did not pick up AI: The Somnium Files sooner. I would never have guessed in all my years alive that I would be actively praising a 30-year-old detective who is also a straight-up gooner.…”
— a player, Steam review · 36 hrs played“really ♥♥♥♥♥♥♥ good. the story is amazing and the humor is actually pretty funny. it also handles going from funny to serious really well too.. its also pretty easy to 100% which is nice. overall 9.5/10”
— a player, Steam review · 22 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-05.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-04). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
No Sleep For Kaname Date - From AI: THE SOMNIUM FILES Available Now!
No Sleep For Kaname Date - From AI: THE SOMNIUM FILES is now available! No Sleep For Kaname Date - From AI: THE SOMNIUM FILES https://store.steampowered.com/app/2752180 No Sleep For Kaname Date - From
Kaname Date's Dreamy Drama Theater: Another World
A short anime that loosely introduces No Sleep For Kaname Date – From AI: THE SOMNIUM FILES! That Time I Got Reincarnated Into A Puzzle Game🧩 Here's Kaname Date's Dreamy Drama Theater Ep. 5! Car-kun m
Kaname Date's Dreamy Drama Theater: Driving School
A short anime that loosely introduces No Sleep For Kaname Date – From AI: THE SOMNIUM FILES! CARname Date's Dreamy Driving Thea- 🤔🚘 Kaname Date's Dreamy Drama Theater Ep. 4 is here! I sure hope Iris k
Kaname Date's Dreamy Drama Theater: 24 Hour Policing
A short anime that loosely introduces No Sleep For Kaname Date – From AI: THE SOMNIUM FILES! ABIS, OPEN UP!!💥🚪 Kaname Date's Dreamy Drama Theater Ep. 3 takes us STRAIGHT to Matsushita Diner to questio
Kaname Date's Dreamy Drama Theater: Cooking Class
A short anime that loosely introduces No Sleep For Kaname Date – From AI: THE SOMNIUM FILES! LET. HER. COOK😤👩🍳 Here's Ep. 2 of Kaname Date's Dreamy Drama Theater! Maybe cooking got Iris abducted in t
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-12.
| Genres | Adventure |
| Player tags | Visual Novel · Anime · Story Rich · Mystery · Detective · Adventure · Gore · Sci-fi · Comedy · Multiple Endings · Choices Matter · Violent (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Trading Cards · Partial Controller Support · Steam Cloud · Remote Play on Phone · Remote Play on Tablet · Family Sharing |
| Languages | English * , Japanese * , Traditional Chinese * |
| Achievements | 45 |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS *: 64-bit Windows 7 Processor: Intel Core i7-3770 @ 3.40 GHz or better Memory: 4 GB RAM Graphics: NVIDIA@ GeForce@ GTX 460 or better DirectX: Version 11 Storage: 20 GB available space Sound Card: DirectX compatible soundcard or onboard chipset Additional Notes: 2 GB VRAM