Games available in most casinos are commonly called casino games. A casino game typically provides a predictable long-term advantage to the house while offering the player the possibility of a large short-term payout.
Casino games often offer the player the illusion of control in which the player is given choices, but the choices do not eliminate the player's long-term disadvantage (the house advantage). This disadvantage is caused by the casino not paying the full amount that would be expected for the odds wagered. For example, if one game was played by betting what number a roll of a die would give, instead of paying 6 times the amount bet for winning (because it's a 1 in 6 chance) the casino only pays 5 times the amount bet.
The most common set of games in online casinos could be shown in a list below. Click each game link to get more information on selected game.
Almost every casino game has its rule variations. The reason of it is that almost all of casino games are very old and were played for centuries in different countries. To read the variants of specific game, choose the link above (popular casino games), there you will find the description of a game with its variations.
The common game in the online casino is a game where you play with casino only. But there is a plenty of online casinos, which provide multiplayer games. A multiplayer casino game is game in which you play not only with casino, but side by side with other casino players. You often can chat with them and even find new friends playing such games.
There are also some casinos on the internet which provide gaming with live dealers. This means, that you are now seeing the dealer online, you can chat with him and many more. This is the really quality enhancement of online casinos.