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The4thMind
4 Players. 1 AI. Who's Lying?
The4thMind takes the AI guessing game into a group setting: 4 players, 1 hidden AI, and everyone has to figure out who’s the machine. Chat, investigate, accuse, defend yourself, then vote. You can also face another human 1-on-1 in Duel. The twist? You’re judging the AI while questioning whether the other humans are wrong. Play instantly in your browser.
About The4thMind on Product Hunt
“4 Players. 1 AI. Who's Lying?”
The4thMind was submitted on Product Hunt and earned 2 upvotes and 2 comments, placing #160 on the daily leaderboard. The4thMind takes the AI guessing game into a group setting: 4 players, 1 hidden AI, and everyone has to figure out who’s the machine. Chat, investigate, accuse, defend yourself, then vote. You can also face another human 1-on-1 in Duel. The twist? You’re judging the AI while questioning whether the other humans are wrong. Play instantly in your browser.
On the analytics side, The4thMind competes within Artificial Intelligence and Games — topics that collectively have 576.6k followers on Product Hunt. The dashboard above tracks how The4thMind performed against the three products that launched closest to it on the same day.
Who hunted The4thMind?
The4thMind was hunted by eovacius. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of The4thMind including community comment highlights and product details, visit the product overview.
Hello hunters! WRITTEN BY EOVACIUS
I built The4thMind because I kept wondering about a slightly different version of the Turing test:
What happens when you don't know which person is the AI — and everyone at the table is trying to figure it out together?
Games like Human or Not showed how interesting it can be to judge whether you're talking to a human or a machine. I wanted to take that idea into a group setting.
So in The4thMind, 4 players sit at the same table. One is secretly an AI. You get a limited amount of time to chat, investigate suspicious answers, defend yourself when people accuse you, and eventually vote.
And this creates a funny problem: You're not only trying to recognize the AI.
You're also trying to figure out whether the other humans are wrong about each other.
Sometimes the AI doesn't even need to be the most convincing player. It just needs to let the humans create enough doubt between themselves.
I've been building this mostly as a small indie project, and we're still very early. The biggest problem right now is also the obvious one: a multiplayer game needs players.
So if you try it today, I'd genuinely love to hear what you think especially about the AI's behavior, the game mechanics, or whether the core idea is actually fun.
If you manage to catch the AI, tell me what gave it away. If you accuse the wrong human... I probably want to hear that even more :]
Give it a shot: https://the4thmind.com/
And if you find something broken, confusing, or just stupid, please tell me. I'm the developer and I'm reading everything.