Tombs of the Fallen is a free content update introduced in version 1.4.0 of Assassin’s Creed Valhalla. It adds a series of puzzle-oriented tombs that invite players to explore vast underground caverns filled with traps, poison, and environmental challenges. Players must use observation, exploration, and parkour skills to navigate these ancient structures and uncover hidden treasures linked to the lore of a long-lost civilization. The content emphasizes non-combat exploration and environmental problem-solving over traditional missions. Additional tombs expanding this feature were released with title update 1.6.1