When playing at online casinos, the first thing people pay attention to is whether the games on the platform are fair or can easily be manipulated. They are hoping for a fair chance to win in gameplay where the outcome hasn’t already been decided. That is why playggbet.It and other trusted sites use RNGs that are checked by independent testers to make sure everything is fair. Random Number Generators are the main algorithms that make a casino game fully unpredictable and give random results.
What Is RNG and How Does It Work? Quick Overview
In simple words, random number generators (RNGs) are the heartbeat of fair play in online casino sites. They make sure game results are truly random and not rigged by generating random sequences of digits. It all starts with a base value called a “seed number,” kind of like the main point for generating random outcomes. From that moment, the system develops a new random number using math, and this continues, generating a new number based on the previous one in the sequence initiated by the original seed. Online casino games then use this process to make sure every result is fair and the gameplay stays transparent for everyone.
This repeat-and-refresh process is regularly checked using special tests to make sure every slot and table game stays fair and honest. Online gaming laws also require casinos to follow strict rules for using RNGs, based on where their servers are located.
The Main Types of Random Number Generators Used in Casinos

There are different kinds of RNGs, but most game developers and casinos use one of two ways to create numbers: either “true random” or “pseudo-random”.
PRNG
This is a software algorithm that uses a given value (the seed) to create a sequence of random digits. Once it has that seed, the system doesn’t need anything else to generate outcomes; it just follows the math. The seed acts like a starting key that initiates the sequence of results generated by the system. It is the first piece the algorithm uses to figure out what happens next.
In games with pseudo-random generators, you won’t see any numbers. Instead, each number is linked to a symbol, like the ones you see on slot reels. That is why some say these results could be predicted. In theory, if you know the seed number and how the system works, you can figure out what’s coming. But in reality, it’s nearly impossible to actually do it.
TRNG
TRNG, or True Random Number Generator, is a real device that creates random results using things from nature, like static, temperature changes, or even tiny particles. These things are always changing in ways we can’t predict, so the results are truly random. The device reads those changes and turns them into numbers. However, this method is mainly effective for land-based casino games. For online games, most developers use PRNG.
Are RNG-Based Games Truly Fair?
Reputable and legal gambling sites use RNG software that gets checked often by independent experts. These outside companies offer testing and advice to both land-based casinos and online platforms. Their regular checks cover things like:
- Checking live dealers, sportsbooks, and betting exchanges
- Making sure the RNG works properly
- Reviewing game rules and the math behind the games
- Verifying payouts and reporting accuracy
- Inspecting lottery and pari-mutuel systems
This way, players can be confident they are getting a fair and fun experience, whether they are playing in person or online.

Top Testing Companies in Online Casino Gaming
Regular tests are important in iGaming, but which company conducts the checks is more important. Below, let’s have a look at the top reliable testing companies that are known for their trustworthiness and solid reputation.
- iTech Labs: iTech Labs is a trusted company in gambling that has been around for over 12 years. They work with game makers to make sure everything is according to the industry laws and safe. And as their main goal is to protect players, not casinos, their testing is honest. Before they give out certificates, they first check the game’s code for problems, then they run various tests to make sure the game works right.
- eCOGRA: Headquartered in London, eCommerce Online Gaming Regulation and Assurance is the most easily recognized gambling testing company. If you have been around online casinos for a long time, you have probably seen their seal. The goal of the eCOGRA team is to keep things fair, protect players, and hold casino sites accountable. Once a platform passes their RNG checks, it gets the green light. With thousands of tests under their belt, eCOGRA’s stamp of approval carries real weight.
- BMM Test Labs: BMM Test Labs is one of the oldest and most trusted testing companies in online gaming. They have been doing this since 1981, and their certificates are accepted in over 400 places around the world. Their testing process has two main steps: first, they check the tech, make sure the RNG is fair, and then test if the game works as it should. If a casino operator passes these tests, it means the games are safe and reliable.
- Gaming Labs International: Gaming Labs International, or GLI for short, is another big name in the world of testing RNGs for online casino platforms. When a casino or sports betting site has a GLI certificate on its page, then it is a solid sign that its RNG games are played by the rules. To give that badge, GLI makes comprehensive tests, checking the game’s code, studying how the results play out, and putting the system through some tough stress tests to make sure it holds up.
Overall, it doesn’t matter which of these companies tests the fairness of casinos and what type of RNG a casino uses, as long as it does its job right. The whole point is to make games fair, safe, and totally random. And that is why RNG tech is such a big deal in the online gaming world.