A narrative experience of psychological horror and metaphysical mystery. Reality bends, time stutters, and something unseen follows your every breath.

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About This Game

“You think you’re certain you’re awake, but perhaps you’re still dreaming.”

Alteration is a first-person narrative experience that blends psychological horror, science fiction, and metaphysical mystery.

You wake somewhere that shouldn’t exist. The walls hum. The air tastes like metal. Time doesn’t move right, it stutters, like a bad film reel burning in the projector. Things shift when you’re not looking. Objects fade, then come back wrong. And when you think you’re alone, you feel it, something just behind you, breathing in sync with yours. You never see it clearly. You don’t need to. Deep down, you know this place remembers you… and so does whatever’s still here.

As you move through laboratories, temples, and desolate ruins beneath an eternal eclipse, you begin to piece together fragments of a greater design, one that questions the boundary between the human and the divine.

Alteration is not a story to be told, but one to be experienced and interpreted. Every sound, every word, and every illusion carries meaning. The deeper you descend, the more the world reshapes itself around what you believe to be true.

A cinematic, symbolic, and haunting journey about perception, reality, and the terrifying clarity of awakening.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Artificial intelligence was used during the pre-production phase to assist in concept design, reference generation, and the creation of a few 3D models and textures.
No AI-generated content is created or modified during gameplay, and players do not directly interact with any AI systems within the game.

Mature Content Description

The developers describe the content like this:

This game contains mature thematic elements, including psychological horror, brief depictions of non-sexual nudity, and stylized violence.
The experience explores disturbing subjects such as death, divinity, and existential fear through symbolic and surreal imagery rather than explicit content.

System Requirements

Windows
macOS
SteamOS + Linux
    Minimum:
    • OS: Windows 10
    • Processor: Intel Core i5-9 Gen / AMD Ryzen 3 4100 4 cores 3.8 GHz
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GeForce GTX 1080 Ti / AMD Radeon RX580 8GB
    • DirectX: Version 11
    • Storage: 25 GB available space
    Recommended:
    • OS: Windows 10 or higher
    • Processor: Intel Core i7- 09 Gen / AMD Ryzen 5 4500 6 cores 3.6 GHz
    • Memory: 16 GB RAM
    • Graphics: NVIDIA GeForce RTX 2060 / AMD Radeon RX 6700 XT
    • DirectX: Version 11
    • Storage: 25 GB available space
    Minimum:
    • OS: macOS Sonoma 14.5
    • Processor: Apple Silicon
    • Memory: 8 GB RAM
    • Graphics: Apple Silicon
    • Storage: 25 GB available space
    Recommended:
    • OS: macOS 26 Tahoe
    • Processor: Apple Silicon
    • Memory: 16 GB RAM
    • Graphics: Apple Silicon
    • Storage: 25 GB available space
* Starting February 15, 2024, the Steam Client will no longer support 32-bit games or macOS 10.14 or lower.
    Minimum:
    • OS: Ubuntu 18.04 64-bit

    • Processor: 3.4GHz Intel Core i3-4130
    • Memory: 8 GB RAM
    • Graphics: 2GB Nvidia GTX 680
    • Storage: 25 GB available space
    Recommended:
    • OS: Ubuntu 25.10 64-bit
    • Processor: 3.4GHz Intel Core i3-4130
    • Memory: 16 GB RAM
    • Graphics: 8GB Nvidia GTX 1080
    • Storage: 25 GB available space
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