Across the Obelisk: The Sunken Temple opens in the base game Across the Obelisk a path to a forgotten temple beneath the Waterfall, where every step leads to the secrets of an ancient civilization. A changing final guardian, grim events and dangerous relics make each descent unpredictable. This expansion is worth buying for those seeking tense decisions, a sense of risk and reward for bravery in the depths, where it's easier not to remain forgotten.