If you stroll around any casino gaming floor, probably the oldest-looking machines will be those belonging to video poker. These were some of the very first electronic machines ever introduced. As such, the casinos like to hang on to them as they offer a retro gaming experience for many veteran players. Probably the most popular video poker game is Jacks or Better. It's super easy to play. You just choose which cards to keep and which to discard. Nevertheless, the payouts can be super generous.