Games available in most casinos are commonly called casino games.
In a casino game, the players gamble casino chips on various possible random outcomes or combinations of outcomes.
Casino games are also available in online casinos, where permitted by law.
Casino games can also be played outside casinos for entertainment purposes like in parties or in school competitions, some on machines that simulate gambling.
There are three general categories of casino games: table games, electronic gaming machines, and random number ticket games such as keno.
Gaming machines, such as slot machines and pachinko, are usually played by one player at a time and do not require the involvement of casino employees to play.
Random number games are based upon the selection of random numbers, either from a computerized random number generator or from other gaming equipment.
Random number games may be played at a table, such as roulette, or through the purchase of paper tickets or cards, such as keno or bingo.
Casino games generally provide a predictable long-term advantage to the casino, or "house", while offering the player the possibility of a large short-term payout.
Some casino games have a skill element, where the player makes decisions; such games are called "random with a tactical element".
While it is possible through skillful play to minimize the house advantage, it is extremely rare that a player has sufficient skill to completely eliminate his inherent long-term disadvantage (the house edge or vigorish) in a casino game.
Such a skill set would involve years of training, an extraordinary memory and numeracy, and/or acute visual or even aural observation, as in the case of wheel clocking in roulette or other examples of advantage play.