Pyramid Solitaire Duel. Make 13 your lucky number by mastering these tricky card pyramids! Play with friends in this multiplayer game! It is one awesome multiplayer online card game. You battle other players on the web in trying to get rid of all your cards as fast as possible by stacking them in pairs that make up the value 13. You can also get a higher score by getting some bonuses. Full rues are inside the Pyramid Solitaire game. Find an opponent and try playing Pyramid Solitaire now! Enjoy and have fun.