Echo Decode is an audio-led eerie puzzle experience set in a dark and hostile environment.

Background Story

This project is set in a dream-like space.

In my dreams, I often enter strange environments that do not feel like real architecture. They are made of corridors, doors, shadows, and machines whose purpose is unclear. These spaces are quiet, but not peaceful. Instead, they create the feeling of being watched. Vision does not fully explain the environment, so the player must rely on faint sounds such as electrical hums, mechanical signals, and distant movement.

In this game, progression is not simply about finding an exit. The player must locate hidden machines and complete calibration tasks in order to unlock the final door. However, a patrolling guardian turns this process into a threat. If the player fails, the sound attracts the guardian and forces them to hide.

Rather than telling a fully explicit story, the game aims to recreate dream logic: the player may not understand where they are or why the space works this way, but they must keep listening, moving, and decoding in order to escape.

The core interaction is based on timed audio cues. During calibration, the player must listen closely and respond at the right moment while watching a moving pointer. This mechanic turns listening into both a puzzle and a survival skill.

To increase tension, the space is patrolled by a guardian. Its movement is marked by red warning light, allowing the player to anticipate danger and hide in advance. If the player fails a decoding attempt, the failure attracts the guardian’s attention and triggers an investigation. This creates a connection between puzzle failure, spatial pressure, and stealth.

The project explores how sound, atmosphere, and minimal visual information can work together to create meaning. Instead of relying on direct instruction, the game encourages the player to pay attention, interpret audio signals, and move carefully through space.

Features

- Audio-led exploration and navigation

- Calibration-based decoding puzzle

- Four machine objectives and a final door sequence

- Patrolling guardian with investigation behaviour

- Red-light warning system for danger anticipation

- Eerie atmosphere focused on tension and listening

Controls

- WASD – Move

- Mouse – Look

- F – Interact / start decoding

- Space – Confirm / calibration input

1. Intent and Goals

The goal of this game is to create an eerie audio-led experience in which the player moves through darkness and uncertainty by listening rather than relying on clear visual information. I wanted sound to function not only as atmosphere, but also as navigation, feedback, pressure, and survival mechanic. The project attempts to turn the instability and ambiguity of dream experience into a playable space.

2. What I wanted the player to feel

I wanted the player to feel uneasy, attentive, and under constant pressure. This feeling comes from limited visibility, unfamiliar space, subtle but important sounds, and the possibility of danger approaching at any moment. I also wanted the player to experience a dream-like eeriness, where they do not fully understand the space but must keep moving, listening, and responding in order to survive.

3. Why I designed the gameplay and atmosphere this way

I designed the gameplay and atmosphere this way so that form and meaning would support each other. Darkness reduces visual certainty and makes sound more important. The machine hums guide exploration, the calibration mini-game creates timing pressure, and the guardian turns failure into a real spatial threat. Together, these systems make the player experience tension through listening, waiting, hiding, and uncertainty.

4. Development Pictures

The development pictures show how the project evolved from an early prototype into its final form. They include scene construction, UI design, calibration system testing, machine placement, guardian patrol setup, and final gameplay views. These images demonstrate the process of turning a basic interaction idea into a more complete audio-led experience.

Big Ideas

This project explores three main ideas. First, sound can become a mechanic rather than only atmosphere or feedback. Second, darkness can be used as a design strategy that changes how the player perceives space. Third, eeriness can be created through sound, space, repetition, and uncertainty rather than direct horror confrontation.

Made for

IS71078B: Approaches to Play 2