As you know, online casinos are trying to diversify their library of games to attract as many new users as possible. In the following infographic you can see the most popular types of casino games. 

I also want to note that it's important to choose a casino not only by the number and types of games, but also by their licenses. A licensed casino lets you play safe and you don't have to worry about losing your winnings.The best licensed casinos you can find here https://gamblorium.com/casinos/.