Get ready for an even more challenging climb with Acclimatization, the expansion for the solo game Unsurmountable! This time, the altitude spares no one, and the thin air will test your limits. To survive and reach the summit, you'll need to establish strategic camps to acclimatize. This expansion adds six new cards, two of which will become your new camp objectives, which must be reached sequentially before you can even think about the summit. To set up camp, the key move is to align two specific terrain features horizontally adjacent to each other. If you already enjoy Unsurmountable and crave more challenge, this expansion introduces a new layer of planning and resource management. And for those who own 'The Big Climb' expansion, the fun doubles: you can combine both and face a trek with three camps for an epic, multi-stage expedition! It's the extra dose of difficulty and strategy that fans of micro climbing games have been waiting for.