Texas Hold 'em is probably the best known and most popular form of poker today. All of the marquee tournaments around the world are played in a variation of this game. As in most forms of poker, Texas Hold'em uses a standard 52-card deck that is shuffled before every hand. Don't let the simplicity of the game mislead you. The number of possible game situations is so vast that, when playing at a high level, the game can be very complex.