The final expansion in the Summit Series, Sanity brings another dimension of play and immersion as players attempt to refine their character's focus while maintaining their sanity - all while trying to survive the world's deadliest mountain. Can they keep their wits, or will they breakdown under the immense pressure of the expedition... or the competition? With a Yeti on their heels, and/or a rival Team pushing for the Summit it's just a matter of time before someone cracks like the ice under their feet... Mind over matter? Prove it. Sanity works in all play modes (competitive, cooperative and solo) and can be played with any/all expansions (Yeti and/or Teams).