The Witcher 3: Wild Hunt – Hearts of Stone is the first major expansion for The Witcher 3: Wild Hunt, released in October 2015. It adds a new storyline set in the existing game world, where Geralt is hired to deal with Olgierd von Everec, a nobleman with a mysterious and cursed past. The expansion introduces new characters, quests, enemies, and the Runewords system, which enhances gear with power