Retroid: Cartridge Protocol
Release date: Nov 7, 2025
Developers: Zero1Play
Publishers: Zero1Play
Genres: Action, Indie, Early Access
Categories: Single-player, Steam Achievements, Steam Cloud, Stats, Family Sharing
Supported languages: English, Korean, Japanese

🎮 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. 📘 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.