Company: NA
Software providers: RTG
Minimum deposit: $10
Withdrawal limits: $10
Payout speed: 3+ days
3.0/5
Visit SiteWe do not have a lot of information about Mr O Casino and its sister sites, as they simply do not provide any on their website. This kind of approach always raises a certain level of concern from our side, as we prefer to recommend our users more reliable and transparent options.
Overall, Mr O does look appealing to US players for a few reasons. Firstly, it is powered by a highly demanded RTG software. Secondly, convenient crypto payments, but we cannot say that cashouts are fast. And, last but not least, attractive no rules bonuses. Then again, there are rules applied to the welcome match.
So, while Mr O appears to be solid, it would be great to see some basic info presented on the site.
Mr O Sister Sites
At the moment, Mr O sister sites include casinos such as Goat Spins and Eternal Slots. Both casinos are nearly identical to Mr O in terms of banking, games, and targeted countries. Basically, if you had no issues with Mr O, these two would definitely meet your expectations.
Goat Spins and Eternal Slots attract players with super generous free chips, valued $77 or $75. Then, Eternal Slots offers a 111% “no-strings-attached” bonus on the first deposit. At the same time, Goat Spins boasts a bigger 225% one.
- 225% Welcome Bonus
- RTG Games
- Unknown Operator
Goat Spins was opened in 2024 by the company, which has launched two other casinos, like Mr O and Eternal Slots. It would be great to see more information about the management as it is very hard to say if Goat Spins is a reliable brand or not. Given its online presence, it has earned a decent reputation among US players.
We really get why Goat Spins attracts players, as it offers popular RTG games and crypto payments. Not to mention a very generous $75 free chip and a 225% match bonus on the first deposit.
To sum it up, we are a bit concerned about Goat Spins and hope to see it prove us wrong.
- +$77 Free Chip
- RTG Games
- Accepts Crypto
Eternal Slots is a casino that popped up in 2024, together with its sister sites, by an undisclosed company. The fact that we know little about it raises a certain level of suspicion to keep in mind.
If Eternal Slots were a bit more open about its management, we would happily 100% recommend it. It does look like a modern US facing casino with a full collection of RTG games, which tend to be the most popular ones on this specific market. The site also allows crypto payments.
Another standout feature is its bonuses, as there is a no deposit $77 free chip and a 111% No rules welcome bonus. Well, there are definitely conditions to be aware of when claiming this no-strings-attached bonus, as specific rules apply to it.
5 Alternative Casinos to Mr O
RTG is the most popular game provider among American players, so there are some good and reliable casinos available.
BettyWins is one of several casinos owned by the Casino Extreme group, a well-known company that has a solid reputation. Betty itself is a 2025 casino featuring high quality casinos from RTG. Players love this site for its fast crypto cashouts that Betty Wins aims to process within the same day. Moreover, the site offers attractive welcome promotions, such as a whopping $159 free chip and a 150% no rules bonus. So, the welcome structure is similar to MrO; however, Betty Wins is more reliable compared to the latter.
Another reputable casino is Cafe casino, a slots focused brand from Bovada. It hosts not only RTG games, but also more providers, which gives you a wider choice of games. It does not offer any free bonuses, but if you deposit with crypto, it will be matched with a superb 350% bonus.
- New RTG Casino
- Generous Bonuses
BettyWins is a fantastic online casino tailored for American players. Part of the Casino Extreme family, it is a trusted option with a rich collection of RTG slots.
Another attractive feature of BettyWins is its amazing promotions. First, you get to test with an exclusive $150 free chip and enjoy a 150% no rules welcome bonus. There are also nice bonuses for crypto players, as Bitcoin is a preferred banking option for USA customers.
The bottom line is that BettyWins is an exceptional casino with fast payments, lucrative bonuses, and a good reputation.
- $50 Chip
- Bitcoin Accepted
- RTG Games
Casino Brango is a RTG powered site that was launched in 2017. It is not a surprise why it is supplied by these providers as almost 75% of US-focused sites go with this very software. Besides, when you see a success of the sister Casino Extreme, you know it is a right choice.
Not many casinos that brag about same day cashouts, but it is a reality at Brango. True that any other method can take longer, but with Bitcoin, you will get your winnings faster.
You should definitely check it out with $50 free chip. In addition, you can grab a 500% match bonus on your first crypto deposit.
- Casino for US
- Excellent Welcome Bonus
- Bitcoin Accepted
Slots Ninja is a superb new casino that comes from the Casino Max family. We are sure that it will follow in the footsteps of its sister sites and become a popular brand among US players.
It definitely has everything to become so: a complete collection of RTG games, bitcoin deposits, and an incredible welcome offer. We encourage you to deposit in crypto to get an increased 500% welcome match. If you go with fiat, the match is still high – 350% that can be used 4 times.
We recommend Slots Ninja for American players.
- Best Slots Casino USA
- Huge Welcome Bonus
- Quick cashouts
Cafe Casino is a Bovada sister site that was launched in 2016. Cafe Casino gets a huge reputation bump for being part of this trustworthy company.
While its sister sites include poker and live games, Cafe is strictly a casino site. The lobby is diversified and includes titles from Rival Gaming, Real Time Gaming, Makitone and Revolver Gaming. That is basically all the best providers available in the U.S.A.
If you deposit with Bitcoin, you are in for a real treat! The first deposit gets a 350% match up to $2,500 bonus!
- $7777 Bonus
- Trusted Casino Since 2007
- RTG
SlotoCash Casino was established in 2007, that means they have over a decade of experience in the online gambling industry. At least, we know that they are not planning to go anywhere. This site is one of the popular choices among US players looking for a place where they can gamble online.
SlotoCash offers a wide selection of payment methods, including Bitcoin. Your withdrawals will take less if you decide to deposit with crypto, otherwise it can take 1-2 weeks for other banking options.
Due to its very generous welcome bonuses well as a great selection of games provided by RTG, SlotoCash is an attractive destination. You can claim $7777 + 300 free spins welcome pack that is spread over your first 5 deposits.
Mr O Casino Review
Mr O Casino is a crypto casino primarily catering to US players. The website is powered by RTG software and offers no rules bonuses, which should make it popular with bonus chasers. However, like most crypto-focused online casinos, the website doesn’t hold an active license from any regulator. There’s no information on who owns the casino, either, which we aren’t big fans of.
The list of available games will be familiar to anyone who played in an RTG-powered casino before. It includes video slots, casual games, video poker, table games, and specialty titles. Every category has several subcategories, making it easier to find your favourite releases. You can try most games at no cost using demo mode, though only if you aren’t already signed in. Otherwise, the Play for Fun option will not appear.
Mr O Casino is home to over 220 slots. The list includes classics like The Big Bopper, Bubble Bubble 2 and Aztec’s Treasure. However, you can also find newer RTG releases such as Whispers of Seasons and Fortunate Zeus. Clicking or tapping a game displays its details, including volatility, theme, and available features.
The website features several promotions, including its welcome pack that awards a 400% deposit match up to $10,000 and 400 free spins. The bonus has a $10 minimum deposit and a 40x deposit + bonus wagering requirement. After completing the new player promotion, you can check out multiple reload bonuses, a VIP program, and a No Rules deposit match bonus. The promotion stands out thanks to its 1x deposit + bonus rollover, which seems ideal for bonus hunters. However, the casino takes steps to protect itself against such players, meaning the promotion isn’t quite as no-rules as it appears.
When it comes to payment methods, Mr O Casino only accepts cryptocurrency for deposits and withdrawals. You can use several coins for deposits, including Bitcoin, Ethereum, Tether, Bitcoin Cash, etc. However, only Bitcoin and Litecoin can be used to cash out your winnings. The website does not impose any payout fees.
Our Verdict
Mr O Casino is a solid crypto casino, though one that doesn’t do enough to stand out from the crowd. Its No Rules bonus is promising, and RTG games are always fun to play. Plus, its fast crypto transactions ensure you won’t have to wait long to get your winnings. That said, dozens of online casinos offer the same thing as Mr O Casino without asking us to play on an unregulated website. Because of that, we can only rate this casino 3 out of 5 stars.