Cairn, a brilliant and bold new climbing game for PC and PlayStation 5, has only one scalable mountain: Mount Kami. This craggy beast towers above all surrounding peaks, glowing an ominous blood-red at sunset. When you walk up to the rock face, the protagonist Aava, a woman in her thirties, carefully places two hands on it. From there, you move a single limb at a time, methodically ascending while leveraging Aava’s body against deep fissures and clinging on to thin slithers of stone. If this expert mountaineer’s body is under particular duress, her arms and legs will tremble, and her breathing becomes shallower, more panicked. The views from Mount Kami are spectacular and the rock formations stupendous, but Cairn is a game, first and foremost, of heart-pounding, white-knuckle anxiety.