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Room 404 repeats. Identify anomalies, file reports, and stay alive—some anomalies might hurt you. Nurture the plants, listen to the overlord, end the loop, and unlock multiple unique endings.
Room 404 repeats. Identify anomalies, file reports, and stay alive—some anomalies might hurt you. Nurture the plants, listen to the overlord, end the loop, and unlock multiple unique endings.




Experiment 404 was released on 3/31/2026.
Experiment 404 is a Adventure, Indie game.
Experiment 404 supports single-player.
On the Experiment 404 page at GameWorld you can browse community guides and download resources (Korean patches, trainers, save files and more), or upload your own.