The idea that online casino games might be rigged has been around for as long as the internet has offered betting. It’s easy to see why—when the reels do not land how you’d hoped, doubts can creep in.
This guide walks you through how online casino games work, the rules that licensed operators like Thor Slots must follow, and how fairness is checked. By understanding the systems in place and the safeguards that protect you, you can make sense of what happens behind the screen and decide how you feel about it.
How Online Casino Games Actually Work
Online casino games run on digital software designed to replicate the experience of playing in a physical venue. In a slot, the symbols you see on the screen spin and stop based on a set of programmed rules. In roulette, the wheel result is calculated digitally. Card games follow fixed rules for shuffling, dealing, and potential payouts.
Each casino game comes with a paytable, which is a chart showing what combinations pay and how features can activate. These might include free spins, bonus rounds, or special symbols such as wilds or scatters. Not all games work in the same way, so reading the paytable before playing can help you understand what could happen.
You will also see a figure called the Return to Player (RTP) rate. This is a theoretical percentage that shows how much a game is designed to return to players over a very large number of rounds.
For example, an RTP of 96% means that, in theory, £96 may be paid back for every £100 wagered—spread across all players over time. It is not a prediction for a single session.
Another factor is volatility, which describes how results can vary from game to game. High-volatility games may produce fewer wins, but offer larger potential payouts if they occur, while low-volatility games are designed to offer smaller possible wins more often.
It’s important to remember that these games are random. The outcomes are not influenced by what happened before, and there is a built-in advantage for the casino, known as the house edge. This is what allows the operator to make a profit over time.
Are Online Casino Games Rigged?
In the UK, online casinos must hold a licence from the Gambling Commission before they can offer games. This includes sites like Thor Slots. A licence is granted only if the operator meets strict requirements on fairness, transparency, and protecting players.
Every game must be tested by an independent company before it can be used on a licensed site. These companies, known as test houses, have no connection to the casino or the game developer. Their job is to check that the game’s results are random, the advertised RTP is correct, and the game behaves as described. This prevents operators from using any games that have been altered in a way that could be unfair to players.
If a licensed casino breaks these rules, the Gambling Commission can issue large fines, suspend the site, or even remove its licence completely.
You can see if a casino is licensed by looking for its licence number—usually shown at the bottom of the homepage—and checking it on the Gambling Commission’s public register.
What Is Random Number Generator Technology?
Most digital casino games use a Random Number Generator (RNG). This is software that produces thousands of random number sequences every second. When you click “spin” or “deal”, the game takes the current sequence and maps it to an outcome—such as which symbols appear on a slot, or which number the roulette ball lands on.
Each outcome is independent from the last. A long run of potential wins or losses does not make any particular result “due” next. Certified RNGs are built so neither the player nor the casino can predict or alter the result. Testing bodies such as eCOGRA, iTech Labs, GLI, or BMM Testlabs check this software to ensure it works correctly.
Live casino games work differently. Instead of using an RNG, the results come from real-world actions, like a dealer spinning a physical wheel. These games are streamed in real time, and fairness is maintained through cameras, trained dealers, and the same strict licensing rules.
How Do UK Gambling Commission Rules Protect Players?
The Gambling Commission’s Remote Technical Standards set out exactly how licensed operators must run games. This includes rules that games must perform as described, be free from misleading features, and clearly display information, such as the RTP and any game rules.
Operators must only offer games that have been independently tested and approved. If a game has different possible RTP settings, the operator must show which one is being used. Any changes that could affect fairness—such as altering the RNG or potential payout structure—must be tested again before the game goes live.
There are also tools to help players manage how they gamble. On Thor Slots, for example, you can set deposit limits or take a time-out. Licensed sites must make these options easy to find, along with information on how to get help if you have concerns about your gambling.
Can Casinos Change Game Odds After You Start Playing?
The odds in a casino game are set by the developer before it is released. On UK-licensed sites, these cannot be changed for a specific player or altered mid-game. Once you have pressed “spin” or “deal”, the RNG selects the result instantly, and it cannot be influenced after that point.
Some games are made with more than one RTP version. If a casino chooses a different version, it must clearly display it to players. Changing a game’s configuration is treated as a major update, which means it must be re-tested before going live.
Remember, the RTP is a long-term figure. A game designed with a 96% RTP can still produce outcomes that are much higher or lower than this average.
Why Do Some Players Think Online Casino Games Are Rigged?
It’s common to feel suspicious after a series of losses, especially if you have just seen other players winning. This is often due to the gambler’s fallacy—the belief that a certain outcome is more likely because of recent results. Since each outcome is random and independent, the past does not influence the next result.
Volatility can also cause misunderstanding. In a high-volatility slot, you might have a long period without wins, followed by a bigger possible payout. This is part of the game’s design and not a sign that the casino is “loosening” or “tightening” any potential payouts.
Confusion can also arise from misinterpreting the RTP. Seeing “96%” does not mean you will get £96 back from every £100 wagered in one session. It is an average over many thousands of rounds across all players, and does not guarantee any winnings.
How to Spot a Licensed and Fair Online Casino
A genuine UK-licensed casino makes its credentials easy to find. Look for the licence number and check it on the Gambling Commission register. Reputable sites usually display game rules, RTP figures, and details of the game providers they use.
Fair casinos also use established software studios and clearly set out how any bonuses, withdrawals, and promotions work. Security is important too—check for “https” in the web address and visible privacy information.
Independent testing certificates are another sign of fairness. These show that games have been audited to ensure the results are random and that the advertised RTP matches the actual design.
What Happens If a Game Is Found to Be Unfair?
If a game is found to be faulty or unfair, it is usually removed from the site while the developer investigates. The issue is fixed, and the game is re-tested before it returns. If players have been disadvantaged, the operator may refund or credit affected accounts.
For serious breaches, the Gambling Commission can fine the operator, suspend operations, or remove the licence entirely. Players can also take disputes to an approved Alternative Dispute Resolution (ADR) provider for an independent decision.
Safer Gambling Message: Gambling should only be done with money you can afford to lose. If you choose to play at Thor Slots, or any other UK-licensed casino, set a budget and stick to it. Taking breaks, setting limits, and keeping gambling as a form of entertainment can help you avoid spending more than planned.
*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to these games are subject to change at any time. Game features mentioned may not be available in some jurisdictions.
**The information provided in this blog is intended for educational purposes and should not be construed as betting advice or a guarantee of success. Always gamble responsibly.