From PathfinderWiki

Towers is a sacrilegious gambling game played with the sacred deck of cards used for the Harrow by Varisian fortune-tellers. The game is played with two to four players with a Harrow deck. The players lay out the neutral cards for each ability to represent the foundation of a tower, such as the Tower of Intelligence and the Tower of Wisdom. On their turn, the players try to play a card from their hand that matches the position of a card in one of the towers. Otherwise, they must "flee", paying each payer a number of coins equal to the number of cards left in their hand.1


For additional as-yet unincorporated sources about this subject, see the Meta page.

  1. Jason Bulmahn, et al. Harrow Deck, 26–30. Paizo Inc., 2014