# Otorisousa-decoy investigation — Blend in with AI. Spot the AI.

> Multiplayer party game of deception, identifying AI, and bluffing. (iPhone/iPad app by mizuki tatewaka.)

- Source: https://appshunter.io/ios/app/otorisousa-decoy-investigation/id6779975687 (this page in markdown: same URL + `.md`)
- Developer: [mizuki tatewaka](https://appshunter.io/developer/1831580099)
- Category: Games, Entertainment, Card, Word
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 13.0 · 96 MB
- Languages: American English, Hindi, Japanese, Chinese (Simplified, China), European Spanish
- Released: 2026-06-21
- Data updated: 2026-08-22
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/otorisousa-decoy-investigation/id6779975687/reviews.md

## What is Otorisousa?

A 1–10 player party game of hidden identities where everyone answers the same prompt while secretly pretending to be AI, tricking one another and exposing the real AI that slips in!
Score +150 points each time you fool one friend into thinking your answer was written by AI.
Earn +100 points every time you expose a real AI for an intense battle of deception.

“Was this written by AI?”
“Or is it a human pretending to sound like AI?”

Look for wording habits, overly polished sentences, and unnatural expressions.
Use those subtle clues to uncover who the suspects really are.

Everyone is both a detective hunting AI and a decoy who throws the investigation off course.
Answer honestly, or deliberately act like AI.
Not just writing skill, but bluffing and psychological warfare decide the winner.

【3 Game Modes】

■ Investigation Meeting: 2–10 players
Pass a single iPhone around and play face to face.
Great for parties, trips, school, or family gatherings.

■ Online Investigation
Same rules as Investigation Meeting.
Gather with a 4-character code.
Everyone answers and votes from their own smartphone, and the reveal syncs across all devices.

【Easy to Learn, Deep to Play】

Everyone answers the same prompt anonymously.

Multiple AI-generated decoy answers are mixed in.

Vote for the answer you think was written by AI.

Reveal identities one by one.

Expose the AI and earn 100 points.
If votes for AI gather on your own answer, earn 150 points per vote.

【AI Answers That Change Every Time】

AI generates decoy answers on the spot to match each prompt.
From polished, obvious answers to oddly human ones, you never know what will appear.

Depending on your connection and device, the game switches between cloud AI, iPhone on-device AI, and a built-in answer bank.
Even without AI, the main party modes can still be played offline.

【Prompts That Keep Expanding】

Played prompts are saved on your device, and new prompts are prioritized.
When AI is available, the app can also generate new prompts and decoy answers after the included set is exhausted.

【Review the Case File】

The latest 100 investigation records are stored on your device.

Who wrote which answer.

Which answers were AI.

Who voted for which answer.

How the score was decided.

Review detailed case files after the game ends.

【Distinctive Titles】

Special titles are awarded based on how you played.

“Hawk Eye” for spotting AI with sharp deduction.
“Mr. Decoy” for collecting AI votes while being human.
“False Accusation Machine” for repeatedly suspecting innocent humans.

■ Solo Infiltration Mode: 1 player
A completely different mode! You infiltrate an AI-filled illegal farm as a human.
Answer three interrogations from the management AI, “Judge,” while convincingly acting like AI.

Observe how the other AI suspects speak, copy their tone, and disguise your thinking.
If Judge decides you are human, you are arrested.

If you’re exposed, the mission fails.
If you blend in until the end, the infiltration succeeds.

This is not a game where AI acts like a human.
It is a reverse Turing test where a human must act like AI.

【Recommended For】

Fans of hidden identity games.

People looking for a party game to play right away with friends.

Players who enjoy wordplay and improvisation.

Anyone who wants to tell AI writing apart from human writing.

Friends who want to have fun online together.

Solo players who want a deduction game.

Anyone who wants to see how well they can act like AI.

Is the answer you exposed really AI?

The more you doubt, the more you get fooled.
The more naturally you write, the more suspicious you become.
A new kind of investigation game where the boundary between human and AI disappears.

Gather your suspects and begin the investigation.

— There’s AI among them.
And you may be a decoy too.

EULA: https://mizukittwk.github.io/otorisousa-legal/terms.html
Privacy Policy: https://mizukittwk.github.io/otorisousa-legal/privacy.html

## Key features

- Hidden identity gameplay
- AI deception mechanics
- Multiplayer modes (local & online)
- Single-player infiltration mode
- Detailed game history logs
- Awarded player titles

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Investigator Pass (Monthly) | $3.99 | per month |
| Investigator Pass (Annual) | $39.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| AI Ticket Small | $2.99 | one-time |
| AI Ticket Large | $5.99 | one-time |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/otorisousa-decoy-investigation/id6779975687/reviews.md

### 5/5 — 斬新な発想！

*2026-07-17*

シンプルなルールで、さくっとテンポ良くやれて飲みゲーに最適

### 5/5 — 鳥がかわいい

*2026-07-02*

ロックスターチキン、かわいすぎ

**Developer response:** おトリ捜査で遊んでいただきありがとうございます！
1体1体作り込んだキャラクターなので可愛がっていただいて大変嬉しいです。
これからももっと楽しくなる機能を追加していきますので、引き続き遊んでいただけたら嬉しいです。
ありがとうございます。

### 5/5 — 盛り上がる

*2026-06-24*

多少人数いた方がおもろい
本当にAIに騙されるレベルで面白いし、飲み会でも楽しめて最高だった

**Developer response:** おトリ捜査で遊んでいただきありがとうございます！
本当にAIに騙されるような体験をしていただき大変嬉しいです。
これからももっと飲み会で場を盛り上げられるような機能を追加していきますので、引き続き皆様で遊んでいただけたら嬉しいです。
ありがとうございます。

### 5/5 — 流行らせたい

*2026-06-24*

シンプルにめちゃくちゃおもしろい
飲み屋で友達とやると盛り上がる
無料でこれはレベル高い！

**Developer response:** おトリ捜査で遊んでいただきありがとうございます！
シンプルにめちゃくちゃおもしろいとのこと大変嬉しいです。
これからももっと楽しくなる機能を追加していきますので、引き続き遊んでいただけたら嬉しいです。
ありがとうございます。

## Frequently asked questions about Otorisousa

### What is Otorisousa-decoy investigation?

Otorisousa-decoy investigation is a party game for 1-10 players where participants secretly act as AI to deceive others, or try to expose the real AI among them. It focuses on bluffing and psychological deduction.

### How many players can play Otorisousa-decoy investigation?

The game supports up to 10 players in its 'Investigation Meeting' and 'Online Investigation' modes. There is also a single-player mode called 'Solo Infiltration Mode'.

### Can Otorisousa-decoy investigation be played offline?

Yes, the main party modes can be played offline even without AI capabilities. The game uses a built-in answer bank for offline play.

### What are the subscription plans for Otorisousa-decoy investigation?

Otorisousa-decoy investigation offers an 'Investigator Pass' with monthly and annual subscription options. The monthly pass costs $3.99, and the annual pass is $39.99.

### Does Otorisousa-decoy investigation have ads?

Yes, Otorisousa-decoy investigation contains advertisements. This is a common model for free-to-play games that offer in-app purchases.

### What is the age rating for Otorisousa-decoy investigation?

The app is rated '12+' by the developer, indicating it is suitable for players aged 12 and older.

### How often is Otorisousa-decoy investigation updated?

The app was last updated on July 30, 2026, with version V1.0.9. This suggests a relatively recent update cycle.

### What kind of prompts does Otorisousa-decoy investigation use?

The game uses prompts that are saved on the device and can be expanded with new prompts and AI-generated decoy answers. The AI generates decoy answers on the spot to match each prompt.

## Version history (last 5 releases)

### V1.0.9 — 2026-07-30

Added Clone Investigation mode.

### V1.0.8 — 2026-07-10

Updated the description in the app summary section.

Added display of who voted on the report screen.

### V1.0.7 — 2026-07-08

Added a feature in Online Investigation/Investigation Meeting that displays a message encouraging better disguise when all players perfectly identify the decoy.

Added a feature in Online Investigation that allows you to view your own vote result on the waiting screen after voting, while waiting for other players to vote.

Added two limited skins:

Pokan Piyo: Obtain by acquiring the “False Accusation Generator” 50 times.

Blade Hawk: Obtain by playing Online Investigation for 5 consecutive days.

### V1.0.6 — 2026-07-02

Updated Investigation Meeting/Online Investigation to allow manual selection of the number of infiltrating AI (decoys) within a range of 2–5.

Fixed an issue in Online Investigation where the host’s currently selected rules were not visible on the guest’s preparation screen; they are now displayed.

Removed misleading description text in the topic selection section of Investigation Meeting/Online Investigation that did not match the actual logic (e.g., auto-switching to AI-generated topics or extra credit consumption when built-in topics are exhausted).

Changed Investigation Meeting/Online Investigation so that selecting “Investigate Again” returns you to the rule selection screen instead of automatically starting with the previous rules.

Fixed a bug where selecting the Sonnet AI model would display as Haiku 4.5 in Investigation Meeting/Online Investigation.

Changed the default number of rounds from 3 to 2 in Investigation Meeting/Online Investigation.

Added a feature in Investigation Meeting/Online Investigation to display AI (decoy) answer length as three options: 1–5, 6–10, or 10+ characters.

Improved AI selection in Investigation Meeting/Online Investigation by showing generation examples. Example: “Sonnet – Something you want to eat in autumn → mushrooms.”

Updated solo infiltration mode so it can be played with a single ad view.

### V1.0.5 — 2026-06-29

Implemented a limited skins feature.

Improved AI quality.

Updated so that if you don’t have enough credits for the starting rounds, you can choose to watch an ad on the spot.

Improved the usability of the investigation preparation screen.

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All apps by mizuki tatewaka: https://appshunter.io/developer/1831580099

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*