The game world is one of the most diversified fields of the entertainment industry. Several categories exist in the gaming industry, such as casual games, casino games, strategy games, etc. Every group has millions of users. These players move from one game to another and usually stay in the same category. But what factors affect the decision making of players in the choice of the game? The answer depends on the expectation of players from the gameplay scenario. Online casinos differ from other games with paying out winnings to their players. So, if the player wants to earn money and enjoy his leisure time, he should find online casino games for money. Today, the internet contains dozens of online casinos and gambling games. However, some of them have gained more subscribers compared with others. In this article, we will mention some of the best online casino providers and games for real money in 2019. One of the most significant features that influence the decision making of online gamblers is how casino games give money out. One of these key performance indicators is volatility which is the most crucial feature of online casino software. Volatility shows paying out the frequency of the game. It means the game with high volatility will pay out money to players more frequently. Some slot games even give out per each spin. Reversely, low volatile online casino games for money will pay out less intense.