KaleiDOS is a ladder-climbing game using many of the rules from the public domain game Big 2.
You can play singles, pairs, trips, and 5 different 5-card combinations into a trick. When all players pass, the highest combination in a trick wins and leads the next trick.
Hierarchy of suits: There are 4 suits in the game, triangles, squares, pentagons, and hexagons. Triangles are the weakest suit while hexagons are the strongest (easiest way to tell is the number of lines in the shape). Suits are used to determine highest strength when the numbers match. For example, a pair of 8s whose strongest suit is a pentagon, can be beaten not only by a higher pair but by another pair of 8s containing the hexagon.
Hierarchy of 5-card combos: Straights, flushes, full houses, 4 of a kind plus 1, and straight flushes can be played against any 5-card combo played into a trick. a 5-9 straight can be beaten by a higher straight (ending in a 9 with a stronger suit or a higher number), or a flush, or any of the other aforementioned 5-card combos.
1s and 2s are the strongest: These numbers are stronger than the 15s! 1s can be used to wrap at the end of a straight and 2s are just very strong. But don’t get caught with 2s in your hand as they will multiply your opponents’ scores!