In this world, everything that was referenced in the dueling monsters card game known as Yu-Gi-Oh is real, like monsters, artifacts and other things.
Neither humans nor the card game itself exists as this is a separate reality from the one from the card game and the anime.
You will be able to explore various regions such as the Forest of lost flowers, Dragon Ravine, the mansion, the Mountain, the Ancient forest.
Each monster lives in their respective biome, such as all Dragon type being in the Dragon Ravine or related areas, Harpies in Mountains and Canyons, water monsters in the shores, ocean, rivers, lakes.
Spell cards are translated as random events, such as the heavy storm turning into a category 5 cyclone.
Others such as the Pot of Greed could appear as cursed items.
This world is vast and diverse, everything that exists in the card game, is there somewhere in this world and is adapted as a real thing.
Elfs would be in the forest, wizards and mages would be in ancient cities and libraries studying and training to develop stronger spells.
Legendary cards such as the three Egyptian God Cards — Slifer the Sky Dragon, The Winged Dragon of Ra, and Obelisk the Tormentor — will be considered as deities and get their deserved respect.