"Hearts of Stone" is a downloadable content (DLC) expansion for the video game The Witcher 3: Wild Hunt. Released in October 2015, it introduces a new storyline featuring the character Geralt of Rivia, a monster hunter. The expansion focuses on Geralt's encounter with Olgierd von Everec, a man cursed with immortality, and explores themes of love, betrayal, and the consequences of one's choices. The DLC adds new quests, characters, and locations to the game, enhancing the overall experience. Players can engage in challenging battles, solve intricate puzzles, and make decisions that impact the narrative. "Hearts of Stone" is praised for its rich storytelling and character development.