Your goal is to spread the influence of the Succubus Queen and defend your "Dungeon Heart" or main base from invading human soldiers. If your main crystal/heart is destroyed, you lose.

Players recommend saving your game before every major dialogue choice. This allows you to view all "bad ends" and scenes without losing your progress in the main tutorial path.

: Unlike many visual novels, it "gets straight to the point," allowing players to reach NSFW content without excessive dialogue.