Black Equation

Black Equation is a dark fantasy interactive book set in the medieval kingdom of Highgard. You follow three lives caught up in the kingdom’s coming collapse, making choices that shape a branching narrative with 12 endings and 7 love stories. Choices leave permanent marks: a romance that heals one character can destroy another, and one playthrough is not enough to see every outcome.

The fall of Highgard

The kingdom’s greatest threat is its crown. Its king, consumed by contempt for his realm, defies fate and challenges the gods, risking everything he holds dear. He seeks not to save Highgard but to erase it and take the neighboring throne of Valtoria. As magic spreads like a slow poison and political intrigue tightens its grip, love, loyalty, betrayal and forbidden bonds become entangled with the kingdom’s fate. The story asks whether Highgard’s fall can be stopped or only survived.

Three lives at risk

Yinyue is an impulsive young mage whose compassion can outweigh caution, and she is willing to burn herself to protect others. William is a restless drifter who avoids responsibility and is torn between desire and duty until he can no longer avoid choosing. Charles is a loyal knight divided between honor and truth, quietly seeking devotion in a world hostile to honesty.

Choices and relationships

Your decisions shape the branching story and have consequences across multiple playthroughs. The seven romances include LGBTQ+ storylines and are woven into the wider plot. The narrative explores psychological depth, political ruin and forbidden loyalties.

Reading experience

The game is designed for focused reading, with prose, ambient audio and imagery. You can customize text styling and choose between Dark and Light modes.