At first glance, MrO looks like a very attractive site: it’s powered by the popular RTG platform, accepts U.S. players, and supports crypto payments. Plus, there are plenty of exciting bonuses listed on its promotions page.
It would be reassuring to see more information about the site’s management and licensing to be 100% confident you’re playing at a safe casino for Americans. However, it’s worth noting that keeping this information limited is fairly standard practice among U.S.-facing casinos.
Overall, MrO is a decent option, offering a 111% no-rules welcome bonus with no max cashout.
P.S. While the bonus is called “no-rules,” there are still a few conditions to be aware of, so make sure to check the details!
MrO Casino Sister Sites
MrO Casino currently has three sister sites that are quite similar to each other. Thanks to their use of RTG software, they manage to attract a good number of players, even though their reviews aren’t the strongest. One of the main draws of Eternal Slots, Detective Slots, and Goat Spins is their no deposit bonuses, which are hard to resist. Both sites feature modern designs and heavily promote crypto play—a smart move, considering cryptocurrency is one of the few reliable cashout options for American players.
Overall, if you had a positive experience at MrO, you’ll likely enjoy Detective Slots and Goat Spins as well, as they offer a nearly identical experience. You can claim a $77 no-deposit bonus at Eternal Slots or 75 free spins at Goat Spins.
Detective Slots is an exciting casino operating in multiple markets, including the USA, Canada, and Australia. The site popped up not so long ago, along with its three sister sites such as Mr O, Goat Spins, and Eternal Slots. Keep in mind that Detective Slots is working without an active license at the time of our review. It is not necessarily a bad thing, as there are many US casinos without proper licensing, but still, it is something to be aware of.
Detective Slots is a very user-friendly casino powered by RTG. It is an immediate attraction for a lot of players who enjoy high quality RTG titles. The most convenient payment method for both deposits and cashouts would be crypto.
Overall, Detective Slots is a decent option for many customers, especially those who like no deposit bonuses. Once you sign up, you get 80 Free Chip and 250% offer on the first deposit.
Goat Spins was launched in 2024 by a little-known company that emerged in 2023. In addition to Goat Spins, the same operator has introduced two other casinos—Mr. O and Eternal Slots. All three brands focus on U.S. players, offering a full suite of RTG games. However, more transparency about the company’s management would be helpful, as it’s difficult to determine whether Goat Spins is a trustworthy brand.
We can only hope Goat Spins proves to be a safe and reliable option for American players. So far, it checks all the right boxes: generous bonuses, a complete lineup of RTG slots, and crypto-friendly banking. Upon signing up, new players receive an exclusive 75 no-deposit chip bonus (code: SLOTS75) and a 225% welcome bonus on their first deposit (code: 225SLOTS).
Bottom line: Goat Spins appears to be a modern, U.S.-friendly online casino. But don’t let the big bonuses distract you—always make sure to read the terms and conditions carefully.
Eternal Slots left us with mixed feelings. On one hand, it’s a very new casino from an unknown company with no licensing information—a definite red flag. While it’s true that many U.S.-focused casinos operate without formal licenses, being transparent about this kind of information would certainly help players feel more secure.
On the other hand, Eternal Slots ticks all the right boxes for American players: it runs on RTG software, supports crypto payments, offers a generous no-deposit bonus ($77 free chip), and features exciting welcome offers. In many ways, they’ve followed the blueprint for a successful U.S.-facing casino. Plus, most player reviews are fairly positive.
Overall, Eternal Slots is a decent U.S. casino, offering a solid selection of games and attractive promotions, but it doesn’t stand out much beyond that.
Alternative Casinos to Mr O
Since all MrO sister sites are still relatively new and unproven, we recommend checking out well-established casinos from trusted companies that are available in the U.S. market.
Bonus Blitz is one of the most popular options, earning mostly positive reviews from players who appreciate its fast payments, generous bonuses, and strong lineup of RTG games. RTG is essential for targeting the U.S. market, so all the casinos we’ve listed feature these high-quality slots. Bonus Blitz is part of the Casino Extreme family, a group that has been online for over 20 years. This long-standing reputation is one of the key reasons we recommend their sites. While they may not always offer the flashiest deposit bonuses, they truly value their customers.
Another strong recommendation is Ignition, which is arguably the most famous casino in this market. It’s packed with games from RTG, Betsoft, Rival, and more. You’ll also find exclusive poker rooms and a wide selection of live dealer games. Ignition has become a go-to choice for many players thanks to its reliable payouts and excellent customer support.
The fact that Bonus Blitz comes from such a reputable family is truly exciting. Reliable US casinos are rare, so it’s great to see Casino Extreme expanding its portfolio and delivering another exceptional product.
Bonus Blitz checks all the right boxes: an outstanding RTG game collection, fast cryptocurrency payments, excellent promotions, a sleek modern design, and a VIP Lounge, among other features. The list goes on, but it’s clear that Bonus Blitz has made a strong impression.
In conclusion, this casino is an excellent choice for American players who enjoy RTG slots and prefer depositing with cryptocurrency.
We were so happy that the Casino Max family launched another U.S. site. Like its sister sites, Slots Room is powered by RTG. This means there is a good selection of slots and table games from this popular software provider. The company is well known and reliable, so we knew from the start that Slots Room would be a hit.
Start off with a huge welcome bonus that gets as high as $8,000 with an additional 200 free spins! Your first deposit will be matched with 400% up to $4,000. Do not forget to use the code: WELCOME400.
Slots Room has a lot of potential to continue growing in this market. It is only a matter of time before it becomes your next favorite casino!
Given the huge success of Casino Max and Spinifinity, it is no surprise that the company keeps treating players by releasing new brands. The main focus of the Slots Ninja is quality slots by RTG, an essential software developer for the US market. Nevertheless, customers will also be able to enjoy live dealers with Visionary.
Slots Ninja’s biggest attraction is its welcome promotions. We definitely recommend trying the site with crypto as you will get a boosted offer: a500% match on your first deposit. If you decide to stick to Fiat, you will still get a very lucrative promo: 350% on slots that you can use 4 times!
In no time, Slots Ninja will become one of the go-to places for American players who enjoy quality games and fast withdrawal times.
In a few words: if Bovada is the most popular gambling site in the US, Ignition is the most popular casino site. Ignition was launched solely as a casino but it became also a Poker Room, however unlike in Bovada, in Ignition the casino is the main thing.
Ignition is perfect for more seasoned / advantage casino players. It’s more classic in its design and layout, the bonuses are not crazy but offer great value for money. Plus you can enjoy a wide array of Live Dealer games and of course Poker tables if you like to mix things up.
If you’re looking for an excellent online casino, be sure to check out the superb addition to the Casino Extreme family: Limitless Casino. It offers an impressive selection of games from RTG, the most popular software among players in the U.S.
One of Limitless Casino’s standout features is its unlimited cashouts, which are advertised as being processed within minutes. While it may take longer due to verification and other factors, the cashout times are still faster than those of most other sites.
Limitless Casino also boasts amazing bonuses and promotions to keep players coming back. For instance, you can grab 100 spins when you sign up using the code LIMITLESS100.
Review & Promotions
Mr.O Casino provides a 400% welcome pack up to $10,000 and 200 free spins. The minimum deposit amount is $10, and you must use the promo code KICKOFF to unlock the offer. Free spins are credited in 5 sets of 80 spins after the deposit bonus has been used. The welcome package is subject to 40x wagering requirements (deposit + bonus funds), the maximum bet per hand is $10, but the offer has no maximum withdrawal limits.
If you redeem the coupon SLOTS111, you can claim a 111% match on the first deposit up to $200. The minimum eligible deposit is $20, the maximum bet per hand is $10, and the wagering requirements are just 1x (deposit + bonus).
No Rules Bonus is another exciting promotion you’ll activate using the promo code FRENZY. The bonus value depends on your deposit. If you credit the balance with $20/$50/$100, you can get 15%, 25%, and 35% bonuses, respectively. The maximum bonus amount is $200, and rollover is 1x for deposit and bonus money.
Weekday bonus awards a 75% match up to $1,000 + 75 free spins. You must deposit at least $20 and redeem a coupon code RECHARGE to become eligible. The bonus has 30x wagering requirements (depost+bonus). The weekend bonus will boost your bankroll with a 100% match up to $1,000 + 100 FS if you credit the balance with $20 or more. This is the only offer at Mr.O Casino you can claim twice a day, and the maximum cashout is limited to x20. The dedicated code for this promotion is DUAL100.
Software & Games
Mr.O online casino offers titles from SpinLogic Gaming (RealTime Gaming). Consequently, the library is not as impressive as some others, but the quality of the gaming experience is not always in numbers. Mr.O Casino is a good example, providing slots, table games, crash games, video poker and specialty games.
As you can see, the diversity is guaranteed. The most popular titles include Robin Hood’s Riches, Great Golden Lion, and Mighty Drums, while the latest releases are Bass Baggin, Glam Cash, and Punky HalloWin Mega Cascade. The great thing about Mr.O Casino we must highlight is the categorisation. Not only does the casino let you sort games by categories, but you can use additional filters, like 3 Reel, 5 Reel, Floating Symbols, or Pays Any.
Popular table games are 32 Cards, Caribbean Stud Poker, Andar Bahar, Suit’em Up Blackjack, Baccarat and Teen Patti. You can also find a great selection of video poker titles, like Aces & Eights and Deuces Wild. However, if you like live dealer titles, you’ll have to search them somewhere else.
Mr. O PaymentsMr. O GamesMr. O Bonus
Specialty games offer Keno and an engaging arcade game, Banana Jones. If you like crash games, check out one of the latest releases from SpinLogic, Galaxy Blast.
Banking
The Mr.O Casino is a crypto-friendly casino allowing you to deposit with Bitcoin, Litecoin, Bitcoin Cash, Ethereum, Tether, Binance, BTC Lightning, Solana, Dogecoin, and Tron. The minimum deposit amount is $10 or 0.0003 BTC. If you prefer fiat options, you can use PayPal to make deposits.
Cashouts are available only with Bitcoin and Litecoin. The minimum withdrawal is $20 and the maximum payout is $4,000 a week. However, if you reach a higher VIP level, you can cash out more (for example, up to $12,000 if you’re on level 3).
Summary
Mr O Casino is the first casino launched by this group, which decided to be anonymous. We believe that transparency is key to being a successful casino, especially if you are a new player on the market.
Besides that Mr O is a solid option with popular RTG games, crypto payments and lucrative bonuses.
