Guandan

Four players, 2v2 partners: two decks, 27 cards each. Offline (you + three bots) or online (four clients in one room).

Combos include single, pair, triple, triple-with-pair, straight, twin straight, steel plate, plane, bombs (4–8), straight flush, and king bomb (four jokers). Heart level card is wild. Three passes return lead to the last player.