What Does RNG Mean?

What Does RNG Mean?

In the online gambling industry and with land-based gaming machines, table games and slots are developed using statistical consequences. In order to assure players that the games are operating in a fair and consistent manner, they are programmed using what is referred to as a Random Number Generator.

A Random Number Generator, or RNG, is a software programming feature that is embedded in the programming language of a casino-style game. The job of the RNG is to make sure that every gambling event (spin of the wheel, turn of the card or roll of the dice) results in a random outcome. The RNG assures that all the possible outcomes are present and that the one that occurs does so without intervention or manipulation from outside sources.

Why is This Important?

The short answer is to prevent cheating by the casino or online site operators. The long answer is a bit more complicated. When players are offering up their hard-earned money to a casino for the opportunity to play a game of chance in order to win money, they will only do so if they are confident that the games are being played in a fair manner. When a player sits in a land-based casino and plays roulette, blackjack or craps, they are an eyewitness to the action and the result. This gives them a feeling of security, knowing the game is being played fair and the result is indeed random without manipulation. When playing a land-based slot machine or any game online, the player only sees the result. They are required to place some level of blind faith in how the result was determined. Software programmers use a RNG to control that aspect of the game.

How Do Players Know They Can Trust an RNG?

It's not enough for players to be expected to just trust the RNG is providing random outcomes. The software developers and casinos have to take it one step further to convince players everything is fair. That step is the audit process. In most highly regulated gaming jurisdictions such as Las Vegas, Gibraltar, the United Kingdom and Malta, every game is required to undergo an audit that is to be performed by a licensed, independent auditing company. That company's responsibility is put each game's software through an intricate set of tests that are specifically designed to determine whether or not the RNG is working properly and is in fact providing random outcomes. If the auditor determines the game is operating properly, they will issue a certification that the game is "fair and safe". The auditing company is motivated to be thorough and above board due to the possible legal ramifications that could come if they fail to do the job properly. Games that fail the testing are sent back for re-programming.

Auditing Companies

While software developers are permitted to choose which company performs an audit on a particular game, the companies from which they can choose must be approved by the gaming governing body from which they are operating or in which the game will be used. Technical Systems Testing (TST), eCOGRA and Price Waterhouse Coopers (PWC) are the most reliable and popular auditing companies in the industry. Due to its reputation for being ultra-conservative, the eCOGRA certification is the most highly respected.

For Players

Prior to signing up with a particular casino, it is important to verify two things. First, the player needs to determine which software company provides the casino's games and research that software developer's reputation. Second, verify that the casino and its games have successfully earned a current "Certified Fair Gaming" seal from one of these prominent auditing firms. If the information is unclear or unavailable, it might be a good idea to find another casino, which has complied with these standards.


We all play games at online gaming sites and usually take the outcomes for granted without knowing what’s behind all this. In fact, certified Random Number Generators and testing agencies do all the hard work to make the industry as reliable and regulated as it is today.

Posted by CCJ Team