Otorisousa-decoy investigation
Blend in with AI. Spot the AI.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
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
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added Clone Investigation mode.
The developer, mizuki tatewaka, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- mizuki tatewaka
- Size
- 100.6 MB
- Category
- Word
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 4 more
- English, Hindi, Japanese, Simplified Chinese, Spanish
- Age Rating
13+
- 13+
- Frequent
Contests
Contains
Advertising
- In-App Purchases
Yes
- Investigator Pass (Annual) $39.99
- Investigator Pass (Monthly) $3.99
- AI Ticket Large $5.99
- AI Ticket Small $2.99
- Copyright
- © 2026 Mizuki Tatewaka