A heads-up no-limit Texas hold 'em is a massive game. It has about 10 to the 161 different decision points. It is also the most popular variant of poker in the world. For example, no-limit Texas hold'em is the game that is played at The World Series of Poker main events. Every year the winner is determined by Heads of No-limit Texas Hold 'Em. It's also featured in popular movies about poker. For example, Casino Royale and Rounders. In some ways, you could argue it's the purest form of poker. It's subjective, but it is a very strategic game,