Official AARP Pyramid Solitaire. A free online solitaire card game where the player tries to match pairs of cards with a rank that totals. Pyramid Solitaire is a free online game where the order you make your matches really, truly matters. Play this free solitaire card game today for free!. How to play Pyramid Solitaire Duel. Click two exposed cards that add up to 13 to remove them. You may also use cards from the stack below the pyramid, which.