A card game is any game that uses playing cards as the primary device with which the game is played, whether the cards are of a traditional design or specifically created for the game (proprietary). Countless card games exist, including families of related games. A small number of card games played with traditional decks have formally standardized rules with international tournaments being held, but most are folk games whose rules may vary by region, culture, location or from circle to circle.

তাস খেলা এমন একটি খেলা যেটি খেলার মূল উপকরণ হচ্ছে 'প্লেয়িং কার্ড' বা তাস। এটি হতে পারে গতানুগতিক নিয়ম অনুযায়ী অথবা খেলাভেদে নিয়ম পরিবর্তনও করা যেতে পারে।