In Ipso, players build a pyramid of number cards and try to form rows of ascending numbers to score the most points. On your turn, take one of the two face-up cards in the center and use it to replace a face-down card in your pyramid, then place the replaced card face up in the center. When all pyramids are revealed, you can either keep your Star card for 3 bonus points or discard it to draw one last card and improve your pyramid. You score only for ascending rows: mixed colors give 1 point per card, single-color rows give 2 points per card, plus 1 point per star and 3 extra if you kept your Star card. The player with the highest total wins.