Hearts of Stone - the first DLC pack for The Witcher 3 - adds about 15-20 hours of new content to the game, extending the northeastern region of the map, near Oxenfurt, with new points of interest, side-quests, and treasure hunts, in addition to other expansion essentials like all-new enemies, new equipment sets, a new system for crafting and buying unique runes and glyphs, and a main storyline that goes toe-to-toe with and even exceeds the best quests in the base game.
