Zero-Sum Heart is a captivating adventure game that delves into a romantic and eerie coming-of-age story. Set in a magical boarding school, players step into the shoes of a protagonist on her eighteenth birthday, where a life-altering decision leads to unexpected consequences. The game features a rich narrative interwoven with elements of romance, teen drama, and thriller, offering multiple endings that enhance replayability. With a playtime of approximately two hours, it presents a unique blend of genres while exploring complex themes of love and sacrifice.

The game is visually striking, showcasing vibrant, psychedelic hand-drawn illustrations that create a dreamlike atmosphere. Accompanied by a witchy and groovy original soundtrack, the experience is both immersive and engaging. However, players should be aware of the sensitive themes presented, including self-mutilation, violence, and toxic relationships, which are depicted in a non-graphic art style. Caution is advised for those who may find these topics triggering.