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MIMESIS is an online co-op survival horror game for up to four players. It was developed by ReLU Games, published with KRAFTON, and launched in Steam Early Access on October 27, 2025 for PC.
Each run sends your team out from a tram into a hostile world. You avoid contaminated rain, collect scrap, and get back to the tram, balancing greed against the risk of not making it back.
The standout threat is the mimics. These monsters copy the voices and behavior of your teammates, so you cannot always trust who is speaking or moving next to you. Voice chat with friends becomes part of the danger.
Gearing up and sticking together are the keys to survival. Equipment helps you deal with threats, while splitting up makes it easier for a mimic to slip into the group. Clear communication, and a little suspicion, can be the difference between escape and failure.
Runs are short and tense, and each one can end in success or a full wipe. MIMESIS suits friend groups who enjoy co-op horror games built on paranoia, voice chat, and short, replayable runs. As an Early Access title, content and features may change over time, so check recent updates before you buy.
PC: PC keys activate on Steam. The game needs 64-bit Windows 10 or newer and a broadband connection.
Early Access: MIMESIS is in Early Access, so the game is still being updated and expanded.
Co-op: It is online multiplayer only, so each player needs their own copy.
Offers come from several stores, so compare the edition, platform, and region rather than price alone. Before you buy, check the activation platform and region on each offer, then follow our guide on how to activate your CD key. More details are on the official MIMESIS website.
Online co-op survival horror for up to four players.
Monsters mimic teammates' voices and behavior.
Gather scrap and get back to the tram.
Avoid deadly contaminated rain.
Copied voices make teamwork tense.
Gear up and stay together to survive.
Short, replayable runs.
Early Access on PC via Steam.
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