The object of TriPeaks is to clear the board by removing cards in order. The order is:
King, Queen, Jack, 10, 9, 8, 7, 6, 5, 4, 3, 2, Ace
The order repeats, so you can go from Queen, to King, to Ace, then back to King. As long as you pick a card immediately in front of or behind the card in the draw pile. Clear the board 100 times to unlock this achievement. You can clear the board multiple times in 1 game.