[English / 中文]

When you wake up, you find yourself trapped in an outdated operating system.

Who are you? Why are you here?

Only mysterious emails guide your way; can you trust them?

Obtain the key, crack the encryption, and uncover the truth hidden within the operating system.

Remember, trust noone.

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DECODER is a puzzle game where players explore a simulated operating system, uncover hidden clues, and crack encryption, uncover the secrets hidden behind this mysterious operating system.