Royal Stone: Hirakareshi Toki no Tobira is set in a fantasy world where you play as an adventurer tasked with unraveling the mysteries of ancient ruins and forgotten civilizations. Your goal is to uncover hidden secrets, strengthen your allies, and overcome formidable foes.
The gameplay involves exploring dungeons, gathering information about the environment and enemies, casting magic spells, and recruiting monsters to join your party. The game features a unique elemental system, where fire, wind, water, and earth determine strengths and weaknesses of enemies and allies alike. Battles are fought from both bird's-eye view dungeon exploration and behind-view combat.