Retroid: Cartridge Protocol Demo

🎮 A New Experience in Sci-Fi Action Roguelike

Retroid: Cartridge Protocol combines fast-paced combat, unpredictable enemies, and the thrill of progression into a high-quality sci-fi roguelike experience. Every run offers new battles and strategic choices, keeping the challenge fresh and immersive.

🚀 This is our first demo!

The journey of Zero-One, the last hope against the Overmind army, begins now.

As this is the first public version, there are still many rough edges.

That’s why your feedback is incredibly valuable.

Share your honest thoughts from battle, and help us prepare for stronger evolutions.

🛠️ What’s next

We plan to launch Early Access later this year.

This demo is only the beginning of that journey.

With your feedback and support, we’ll expand the content and polish the gameplay—

ultimately leading to the mission of finding every cartridge, unlocking your final evolution, and reclaiming the planet from the Overmind army.

📘 Lore

Once overshadowed, Dr. Victor stole Dr. Evelyn’s groundbreaking technology out of envy, creating the Overmind army to seize control of the planet. As Prototype Zero-One, you are the only one who can unlock the hidden power within the cartridges and reclaim the world.

⚔️ Features

• Unpredictable battles – Enemy evolutions create new combat patterns every run.

• Simple yet deep controls – Outsmart foes and map traps with melee strikes and precise dashes.

• Progress through exploration – Permanent and temporary upgrades fuel long-term growth.

• Detailed sci-fi design – Immerse yourself in a richly crafted futuristic world.

Find every cartridge. Unlock your final evolution.
Take back the planet from the Overmind army.