Echo Protocol

Echo Protocol is a 2D post-apocalyptic horror game built in C++ with SDL3.

You play as a survivor hiding inside an old bunker in a world controlled by hostile AI systems.

To survive, you must monitor enemy movement, use the echo scanning system, and deploy decoys at the right moment.

OPEN SOURCE

https://github.com/Fev1L/Echo-Protocol

Features

• 2D survival horror gameplay
• echo scan detection mechanic
• enemy tracking system
• bait / decoy mechanics
• bunker-based monitoring gameplay
• original project built without a game engine

Current Version

Alpha 1

This is the first public playable release of the project.

Core systems are already implemented, but the game is still in active development.

Included Builds

• Windows
• macOS
• Linux !NOT TESTED!

Development Notes

Echo Protocol was created as a personal learning project focused on understanding game development at a lower level, without relying on a game engine.

The project is still evolving and future updates may include:

• improved AI
• visual polish
• sound design upgrades
• balancing changes
• additional gameplay systems