Atelier Iris: Eternal Mana, the first part of the Iris Saga, takes users to the interesting kingdom of Regalzin – a vast country where the forces of alchemy and mana converge to determine the fate of the main character, Klein Kisling. As a role-playing game, the project immerses users in a fantasy narrative, introducing a rich tapestry of characters and challenges. In a dynamic world, users move through a turn-based combat system, giving control to three characters. The ability to switch between party members gives the confrontation strategic meaning.

It is noteworthy that alchemy is introduced into the gameplay – a hallmark of the series. This mechanic harnesses the ever-present power of mana, allowing users to create a variety of items and weapons from a variety of materials. Atelier Iris: Eternal Mana marks a turning point in the series' development as it takes it outside of Japan for the first time. Its release in North America, Europe and Australia expanded the scope of the title, introducing an international audience to the interesting Regallzine universe.

As players delve into Klein's journey, they experience a combination of traditional RPG elements and innovative gameplay. The story unfolds in a visually appealing setting, although graphical details are omitted in keeping with established conventions. The title's strategic turn-based combat and alchemical intricacies push the gameplay beyond simple combat into the realms of craft and strategy.