Poker

You poor bastard.

Poker is the traditional American internationally played card game, predating Richard Garfield's skinny ass by about a century and a half. It has recently seen a revival with the advent of televised Texas Hold 'Um variant poker matches, so much so that skilled players are forming leagues and gaining sponsorship.

Poker has about a fuckton of variations, but the most common are Texas Hold-Em and Five-Card Draw.

If you don't know what this is, then odds are you're housed under a rock of substantial size. If you're simply now sure how it's played on the other hand... well, explanations are as widespread as the game itself, such that explaining it here wouldn't make much difference anyway. Not that it's stopped us elsewhere, mind.

Card Games
Collectible
Card Games:
Call of Cthulhu - Cardfight!! Vanguard - Fire Emblem Cipher
Force of Will - Jyhad - Magi-Nation Duel - Magic: The Gathering
Netrunner - Pokémon - Star Wars: Destiny CCG - Yu-Gi-Oh
Other
Card Games:
1000 Blank White Cards - 7th Sea - Apples to Apples - Bang!
Cards Against Humanity - Coup - Decktet - Dominion - Dvorak
F.A.T.A.L. - Mafia - Mag Blast - Mao - Munchkin
Race for the Galaxy - Sentinels of the Multiverse - Tanto Cuore
Traditional
Card Games:
Bridge - Cribbage - Mahjong - Patience - Poker - Rummy - Tarot