The Lost Child is a first-person role-playing game (RPG) that immerses players in a modern-day dungeon crawling experience, continuing the narrative of the El Shaddai series. Players navigate through intricate dungeons, engaging in random encounters and strategic turn-based combat. Forming a team of up to five characters, players must utilize each character's unique abilities to overcome challenges and defeat enemies.

A standout feature of The Lost Child is the ability to capture creatures encountered during gameplay. These creatures can be added to your team, providing additional strategic options in combat. Furthermore, players can combine captured creatures to create more powerful allies, enhancing their gameplay experience. This combination of exploration, combat, and creature management makes The Lost Child a compelling addition to the RPG genre.