How RNGs Keep Casino Games Fair
RNGs ensure every casino game is fair and unpredictable. Discover how these systems work, how they’re tested, and why they guarantee honest gaming results.
RNGs ensure every casino game is fair and unpredictable. Discover how these systems work, how they’re tested, and why they guarantee honest gaming results.
Fair play matters most when we gamble online. Every Aussie player wants real chances, not fixed results. That is where RNGs, or Random Number Generators, come in.
They sit behind every pokie, card draw, and dice roll. They make sure each game round is random and fair. No one, not even the casino, can control what comes next.
In this guide, we explain how RNGs keep casino games fair, why they matter, and how testing protects players.
A Random Number Generator is a small piece of code that picks random numbers all day long. Each number links to a game result, maybe a symbol on a reel, a card in blackjack, or a number on a roulette wheel.
RNGs power digital casino games. They are the “dealer” for pokies and online tables. They make sure no one can guess or repeat a result.
Live dealer games are different. They use real cards and wheels with people in a studio. But both are still fair. One uses tech; the other uses real action.
You can also read our guide on how we rate online casinos for Australians to see how we test this in detail.
An RNG never stops running. It makes thousands of random number patterns every second, even when you are not playing.
When you hit “Spin” or “Deal,” here’s what happens:
The RNG picks one number from its endless list.
That number links to a symbol or game event.
The game shows the result instantly.
For example, when you spin a pokie, the RNG chooses one random mix from millions of options. What shows on the reels comes straight from that random pick.
This process happens so fast that it’s impossible to predict or influence. Developers and regulators call this non-deterministic randomisation, meaning no previous result affects the next.
There are two kinds of RNGs used in casino games in Australia.
These use math formulas to make random results. They start with a “seed” number and keep building new ones. It looks simple, but the code is complex and very hard to guess.
Most online casinos use PRNGs. They are fast, cheap to run, and easy to test.
These use real-world actions, like noise or light, to create randomness. They are used in science labs or for deep security testing, not everyday casino play.
In short:
PRNGs = algorithm-based, used in online casinos.
TRNGs = physics-based, used for advanced testing.
Both ensure randomness, but PRNGs remain the industry standard for certified RNG casinos because they can be continuously tested for fairness and stability.
A good casino does not test its own games. It hires outside experts.
Groups like eCOGRA, iTech Labs, and GLI check every RNG. They make sure the system stays honest and random.
These labs test RNGs by:
Running millions of fake spins or hands to find patterns.
Checking that the results fit normal odds.
Reading the code to see if it was changed or tampered with.
Testing again every few months to keep results fresh.
According to eCOGRA, all approved RNGs undergo monthly evaluations and are tested “using recognised statistical techniques to ensure fairness and unpredictability.”
When a casino passes, it earns a fair play seal. You will see badges from these testers on legit casino websites. That seal means the site uses certified RNG casinos that play by the rules.
For more about safe gaming, read our Responsible Gambling page.
Without RNGs, digital casino games would not be fair. Players could find patterns. Casinos could change odds. It would be chaos.
RNGs make every game random and level. Here is why they matter:
No bias: Nobody can change or guess results.
Total randomness: Every spin is brand new.
Fairness for all: The same rules apply to every player.
Legal standards: Regulators demand working RNGs for a license.
In short, RNGs protect both sides. You get honest games, and casinos prove they are clean.
Some players do not trust RNGs because they cannot see them. Here are a few common myths cleared up.
Not true. If they did, they would lose their license. Labs test these systems constantly. Any small change in the code would be caught right away.
No chance. The math and encryption behind them are too strong. A single pokie result can come from billions of random patterns.
Nope. It is pure luck. Sometimes random streaks happen, just like flipping a coin five times and landing all heads. It looks fixed, but it is just a chance.
Many players on Reddit have said the same: losing runs feels bad, but that is how true randomness works.
Both are fair, they just use different systems.
RNG games rely on software to generate digital randomness. Every outcome is produced instantly by code and verified mathematically.
Live dealer games, on the other hand, use real cards, wheels, and dealers. Fairness comes from physical oversight, recorded gameplay, and studio regulation.
RNG games are faster and easier to play anytime. Live games feel more social and real. Both must still follow strict fairness rules.
If you like the live side of casino play, check out our live casino games page to learn more.
RNGs can only protect you if the casino itself is licensed. Always check the site first.
Play only at casinos that show:
Clear license details at the bottom of the page.
Test badges from eCOGRA, iTech Labs, or GLI.
Secure HTTPS in the address bar.
Responsible gaming links and payment info in AUD.
When a casino meets all these points, you can trust it to run fair online casino games. Unlicensed casinos might skip testing and fake their claims, never worth the risk.
You can think of RNGs like a lucky draw machine. Every time you play, the system pulls a new random ticket from millions of tickets inside.
The machine never remembers what it pulled before. It never cheats. It just keeps mixing and picking new ones, forever.
That is how every spin and hand stay random. It is fair, clean, and fully tested by experts who do this for a living.
They make sure:
Every game outcome is random.
No one can predict or change results.
Games follow the same fair rules for everyone.
Testing labs keep casinos honest through audits.
Want to play safely? Check out our list of trusted Australian casinos that use certified RNG technology and enjoy games that are truly fair from the first spin to the last.
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