Heart World is a first-person hack and slash game. You will play as Silver and use a sharp sword to fight modular enemies in the heart world.

The story takes place in the overhead dimension "the spiritual world", where the war between humans and negative energy is protracted. You will play the role of Silver to explore the spiritual world. Silver didn't know his life experience, the meaning of existence, or why he fought. Following the path indicated by the guide, you may be able to discover the meaning of your own existence.