Play cards to add to your mountain range. Try to have the biggest range of numbers when nighttime falls and the game unexpectedly ends. You'll need to be clever to steal from others and play the right numbers at the right time to win.
Players will all have a hand of 3 cards. On their turn each player will draw one card, optionally steal a card from another player, replacing it with one of their own, and finally playing a card at either end of their own range.
Other players can steal from you but only a maximum of twice. After that you are safe from having your cards stolen.