Anatine offers players a rich Metroidvania experience set in the mysterious land of Avenis. As a brave duck boy, players must navigate diverse environments filled with enemies, treasures, and unique challenges. The game features large-scale maps that encourage exploration and engagement with well-designed encounters. Players can master various weapons and magical abilities, including the pivotal use of a flute, which unlocks secrets and enhances combat strategies.

The gameplay is centered around defeating corrupted creatures and powerful bosses known as Eidolons. With ten unique locales to explore, including the Ever-Autumn Forest and the Forgotten Grave, players will encounter a variety of landscapes and enemy types. The game's mechanics encourage strategic thinking, as players must manage energy while utilizing the flute’s magic to progress through the captivating and perilous world of Avenis.