Pokemon Odyssey is one of the most ambitious Pokémon ROM hacks ever created. Instead of gyms and linear routes, it delivers a full dungeon-crawler RPG experience inspired by Etrian Odyssey, featuring double-battle combat, deep exploration, custom music, and a dark original storyline.
Pokemon Odyssey is a complete FireRed-based ROM hack developed by PacoScarso and collaborators. It abandons the traditional Pokémon formula and replaces it with a dungeon-focused RPG structure built around exploration, survival, and mystery.
You play as Nyx, an adventurer who arrives on the remote island of Talrega, home to the colossal Yggdrasil Labyrinth — a sprawling multi-layer dungeon filled with dangerous Pokémon, secrets, lost technology, and ancient forces.
Instead of collecting gym badges, progression revolves around mapping labyrinth floors, completing expedition missions, uncovering lore, and surviving increasingly hostile environments.
Odyssey plays more like a classic RPG dungeon crawler than a Pokémon game. Each zone of the Yggdrasil Labyrinth introduces new mechanics, stronger enemy formations, and environmental hazards.
Team building focuses on synergy between Pokémon rather than raw power. Status effects, positioning, typing, and move combinations are critical, especially in boss encounters.
A dungeon-crawler Pokémon ROM hack inspired by Etrian Odyssey with double battles, a new story, and deep RPG systems.
Yes. It is designed for experienced players who enjoy strategic combat.
No. Progression is entirely exploration-driven.
Because it offers something completely different from traditional Pokémon while maintaining extremely high quality.
Yes — Pokemon Odyssey runs directly in your browser on mobile and desktop.