Experiment 15

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Experiment 15 is a two-player online co-op psychological horror puzzle game where you share control of a single body. One controls the body, the other the mind. Communicate, combine what each of you can perceive, and survive a series of disturbing experiments.

Developer: HumanGen Games
Released: Coming soon
Price: Paid
Platforms
Languages: English

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Players on Steam, last 48 hours

No player readings for Experiment 15 in the last 48 hours yet. We poll this game every 30 days.

How this is measured

Player counts over time, as we observed them.

Counts people running the game through Steam only. Players on other stores, consoles or launchers are not included.
We poll the busiest games every 15 minutes and quiet ones as rarely as once a month, so a short spike between polls can be missed. Each game shows how often it is polled.
Our player history starts on 19 October 2026. Earlier peaks, including launch peaks, are not in our data.

Source: Steam Web API, ISteamUserStats/GetNumberOfCurrentPlayers. Full methodology

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