ERGOSUM is a free RPG game available on iPhone that immerses players in a captivating narrative centered around desires and the mysterious being known as 'ゲンザイ'. Players control powerful characters, each with unique abilities, as they navigate through quests and challenges. The game features an expansive growth system where players can enhance their characters by completing various quests, allowing for endless customization and strategy in gameplay.

The competitive aspect of ERGOSUM shines in its arena battles, where players can test their custom teams against others for a chance to earn valuable rewards. New players are welcomed with enticing bonuses, including a character voiced by a popular voice actor and a special gacha reward. Designed for devices running iOS 12.0 or above, ERGOSUM promises an engaging experience for RPG enthusiasts.