73%Strong matchNightmare of Decay
96%4k96% positive reviews, Overwhelmingly Positive across 4k reviews·Horror · FPS
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Upon waking, he finds a world transformed. Now, he must face the manor's horde of the undead alone and unearth the terrifying truth behind the nightmare.
Mutation
SteamDriven by the hardships of life, the protagonist takes a job as a waiter at the remote Xiqi Manor. During a busy dinner banquet, he sneaks away to the storage room, gets drunk, and falls into a deep sleep. Unexpectedly, he becomes entangled in a massive conspiracy within his dreams.
When he wakes up, he finds that everything has changed. The entire manor is now filled with nothing but walking dead. As the likely sole survivor, he must escape this isolated manor of death and uncover the colossal secret hidden behind it all.
This will be the most thrilling night of his life.
This is a survival horror game with limited resources, featuring relatively simple puzzle-solving mechanics that directly drive the game's progression.
The game is played from a first-person perspective with a fixed FOV (Field of View). Players prone to 3D motion sickness are advised to purchase with caution.
This title was developed by a single indie developer. Due to limited production resources, there may be some imperfections. We appreciate your understanding and support!
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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The best games like Mutation are Nightmare of Decay, ZERO PROTOCOL, Ad Infinitum, Venge, and The Living Remain.
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