Onyx Slots Casino Review
Michaela S.
02/2026
Safety Index
User feedback
0 review
02/2026
02/2026
Onyx Slots Casino has been closed and no longer operates.
Onyx Slots Casino was tested by our casino review team. They used our casino review methodology to look at its strong points and the areas that need work. Our team checked the casino's Terms and Conditions, licenses, player complaints, support, and limits. They used these to find out if this casino is safe and honest or a risk to players.
Based on the data collected, we have determined the casino's Safety Index, which is a score given to online casinos to describe their level of safety and fairness. The greater the Safety Index, the higher the likelihood of playing and receiving your winnings smoothly. In our review, Onyx Slots Casino showed gaps in key areas. This led to a Low Safety Index of 4.7. Continue reading our Onyx Slots Casino review and learn more about this casino in order to determine whether or not it's the right one for you.
In working out a casino's Safety Index, we utilize a complex formula that acknowledges the collected data that we have addressed in our review. This generally means the casino's T&Cs, complaints from players, estimated revenues, blacklists, and such.
We have carefully examined and analyzed the Onyx Slots Casino Terms and Conditions as part of our review of Onyx Slots Casino. We uncovered some rules or clauses we did not like and we consider the T&Cs to be unfair. Unfair or predatory rules could be exploited in order to avoid paying out the players' winnings to them. Seeing as we have found some serious issues regarding the fairness of this casino's T&Cs, we encourage you to look for a different casino with fairer T&Cs, or to at least proceed with caution.
Based on our estimates or gathered data, Onyx Slots Casino is a big online casino. In relation to its size, it has a high value of withheld winnings in complaints from players. Since bigger casinos will often receive more complaints because of the larger number of players, we take into account both the casino's size and player feedback.
As far as we know, no relevant casino blacklists include Onyx Slots Casino. If a casino has landed itself a spot on a blacklist such as our Casino Guru blacklist, this could mean that the casino has mistreated its customers. When seeking out an online casino to play at, we consider it crucial for player to not take this fact lightly.
All of that, together with other factors considered in our review, has resulted in Onyx Slots Casino having a Safety Index of 4.7, which is a Low value. We advise players to avoid this casino and explore alternatives with a higher Safety Index.
When reviewing online casinos, we thoroughly go over the Terms & Conditions of every casino in order to monitor their fairness. In T&Cs of many casinos, we come across certain clauses, which we perceive as unjust or overtly predatory. In some cases, these give the casino the possibility to justify withholding player winnings.
We found some questionable rules or clauses during our review, because of which we consider the Terms and Conditions of Onyx Slots Casino to be unfair.
Our casino assessment approach relies heavily on player complaints, which provide us with a comprehensive understanding of struggles experienced by players and how casinos address them. When calculating the Safety Index of each casino, we consider all complaints received through our Complaint Resolution Center, as well as those sourced from other channels.
We currently have 0 complaints directly about this casino in our database, as well as 6 complaints about other casinos related to it. Because of these complaints, we've given this casino 6,858 black points in total, out of which 6,858 come from related casinos. You can find more information about all of the complaints and black points in the 'Safety Index explained' part of this review.
Casino Guru provides users with a platform to rate and review online casinos, and to share their feedback or experience. Based on these, we calculate an overall user feedback score, which can range from Terrible to Excellent.
Sadly, our database currently has no user reviews for Onyx Slots Casino. You have the opportunity to be the first to evaluate and rate this casino on our website, regardless of whether your experience was positive or negative.
Onyx Slots Casino has estimated annual revenues higher than $1,000,000. This establishes it as one of the smaller online casinos within the bounds of our categorization.
Onyx Slots Casino has a gambling license issued by United Kingdom Gambling Commission in United Kingdom.
Onyx Slots Casino accepts deposits via 7 payment methods. This includes: Mastercard, VISA, Trustly Pay, PayPal, Online bank transfer, Google Pay, MuchBetter.
Many online gambling sites place restrictions on the maximum winnings and withdrawal amounts for players. Oftentimes, the win and withdrawal limits are high enough as to not impact most players. That being said, there are casinos, which pose quite restrictive limitations on the win and withdrawal amounts. This is the reason why we consider these limitations in our casino reviews. You can find information about the casino's win and withdrawal limits in the table below.
| Withdrawal limits | Win limits |
|---|---|
| Unlimited | No win limit |
Our expert casino reviews are built on variety of data we collect about each casino, including information about supported languages and customer support. Languages and customer support options available at Onyx Slots Casino are displayed in the table below.
| Language | Website | Customer support | Live chat |
|---|---|---|---|
| English |  |
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During our testing, we always contact the casino's customer support and test their responses to see how helpful and professional they are. We find customer support important, since its purpose is to help you resolve any issues you might experience, such as registration at Onyx Slots Casino, account management, withdrawal process, etc. Based on the test we have conducted, we have rated the customer support of Onyx Slots Casino as average.
Onyx Slots Casino has these types of casino games on offer: Slots, Roulette, Jackpot games, Live games, Live blackjack, Live roulette.
Games from 5 casino game providers are available. This includes Pragmatic Play, Atomic Slot Lab, Wild Streak Gaming, Bragg Gaming, Reel Kingdom.
Bonuses for new and existing players are a way for online casinos to motivate the people to register and try their offer of games. The most common are no deposit bonuses or free spins that you can get for just registering, and deposit bonuses that are given to players for making a deposit. That being said, casinos might offer other types of bonus codes, welcome sign-up bonuses, or loyalty programs as well.
As of right now, our database holds 1 bonus from Onyx Slots Casino:
Please bear in mind that players from certain regions might not have access to these bonus offers. To see which bonuses you are eligible for, visit the 'Bonuses' section of this review.
Take a look at the explanation of factors that we consider when calculating the Safety Index rating of Onyx Slots Casino. The Safety Index is the main metric we use to describe the trustworthiness, fairness, and quality of all online casinos in our database.
We go over the terms and conditions of each casino and look for unfair rules that could potentially be used against players. Any clauses we consider to be unfair result in a lower Safety Index for the casino.
Player complaints signify that the casino does not treat players right or deal with certain situations correctly. We consider the number and seriousness of complaints in relation to the casino’s size, as it can be expected that sites with more players will also have more complaints.
There can also be other characteristics and qualities of a casino that influence its Safety Index, such as win limits, low withdrawal limits, fake games or licenses, bad or no customer support, a network of land-based shops, etc.
We do not have any complaints about Onyx Slots Casino in our database. If you have been mistreated by this casino, you can submit a complaint about it.
Explore the game selection available at Onyx Slots Casino. Find out what types of games are available, which game providers are supported, and which are the most popular titles available at the casino.
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