Highest RTP Slot Machines - Up to 99% Theoretical Payback Percentage

If you want to play the Book of 99 online slot machine with the insane 99% theoretical RTP percentage, then you will need to head to Casino Click. It is the only USA sweepstakes casino that we have found with this game, as most online casinos are afraid to offer players a game with such generous payouts.

We don't fault those other online casinos for not offering Book of 99, because sweepstakes casinos operate under a completely different framework to comply with the law; in most cases, your playthrough requirement is just 1x, and that makes offering 99% RTP games very risky for them.

Why do we love Casino Click?

We love that Casino Click is generous with bonuses. The deposit bonuses are excellent, and we quite frequently see offers of 100% or more on smaller purchases of $4-$8. So if you're a smaller player, you can get a ton of action for your money.

Another thing we really like about them is that they have a nice daily freebie. It is a wheel spin that awards either free coins, free slot spins, or special "Clickcoins" that can be redeemed to buy blocks of ten free spins on a selected slot machine.

McLuck Casino is a super choice if you want to play high RTP slots from Playtech, one of the top online slot machine designers. Among the Playtech slots at McLuck is the Halloween Fortune slot machine that has a super 97.06% theoretical return to player percentage.

But just one great slot machine isn't why we love McLuck Casino. There are so many reasons why we are high on them.

Why do we love McLuck Casino?

McLuck Casino is run by B2 Services, one of the most trusted companies in the online casino industry. They have a superior record when it comes to the important stuff to us: game selection, deposit bonuses, payout speed, and customer service.

Let's zero in on the payout speed for a minute. Whenever we request gift card withdrawals from McLuck, we have them in about eight or nine hours, plus the minimum withdrawal by this method is $10, the lowest in the industry. When we request a cash prize, the money hits our e-wallet in that same 8-9 hour window as a gift card, or the next business day if we request an ACH withdrawal to our bank account.

Play Fame Casino is another great place to play the super Halloween Fortune slot machine, or any of the other high RTP games offered by Playtech.

Even though they recently celebrated their first birthday, Play Fame Casino has quickly established itself as a leader in the industry. Their reviews on third-party ratings site TrustPilot are excellent, and they are managed by one of the top operators in the sweeps casino industry, B2 Services.

Why do we love Play Fame Casino?

Just like McLuck (listed above), Play Fame excels at all the stuff that is important to us, including payout speed, which is at the top of our list. We never wait long to get paid, and when we request a gift card prize, it's just a matter of hours until we have our winnings.

Payout thresholds are low: $10 for gift cards and $75 for cash prizes.

Play Fame is also excellent when it comes to bonuses. New players get a bonus on their first four purchases, plus existing players get lots of offers too. We often have 20%-30% bonuses sitting in the coin store when we log in to collect our daily freebie.

Spin Blitz Casino is yet another great place to play Halloween Fortune, the 97%+ RTP slot game made by Playtech. Whatever your slot machine itch, Spin Blitz has you covered. If you like live dealer table games, they have those too!

Spin Blitz is owned and operated by B2 Services, one of the leaders in the USA sweepstakes casino space. With excellent reviews on third-party ratings site TrustPilot, you know that you're in good hands.

Why do we love Spin Blitz Casino?

Spin Blitz has been one of our go-to sites for some time, primarily because they do such a good job of bonusing existing players with excellent offers and promos. Additionally, new players get bonuses on their first four purchases, so you can get an extra bankroll boost when you start your journey with them.

There are also great missions and tourneys, giving players the chance to add extra free coins to their balance, plus they do lots of social media giveaways on Facebook. (We've even won a few of them.)

Payouts are fast, as is the case at all B2 properties. Our cash prizes usually arrive in one business day, but occasionally two if we submit our request in the evening. Gift card withdrawals arrive in hours.

Spree Casino is yet another great place if you love high RTP slots, including Playtech's Halloween Fortune game. Spree has one of the best slot machine libraries out there, including top titles from all the top providers like 3 Oaks and Pragmatic Play.

We have been playing off-and-on at Spree Casino for quite some time, and there are good reasons why we keep going back for more.

Why do we love Spree Casino?

There are a few things that we really like about this site. First, they do a great job with bonuses. In addition to an excellent signup offer, they send us regular newsletters that always include between one and four special purchase deals. Sometimes the offers are as high as 50%, which is great for a returning player offer at a sweeps casino.

We have also been fortunate enough to cash out on a few occasions at Spree. We like that they don't leave our withdrawals sitting in a pending, or reversible, status for too long. Payments come quickly; in the case of gift card prize withdrawals, we have sometimes received them the same day.

Crown Coins Casino is one of the largest and most respected online casinos on the web. They are getting close to 100,000 ratings from players on third-party site TrustPilot, and their average rating is 4.7 out of 5 stars, the highest we've ever seen from a sweepstakes casino.

Crown Coins is also the only casino we have reviewed with The Great Pigsby slot machine, a feature-packed game with a theoretical RTP over 96%.

Why do we love Crown Coins Casino?

Without a doubt, Crown Coins is one of the best online casinos in terms of promotions, especially when it comes to creativity. While some casinos just offer a percentage bonus to players, Crown Coins has offers like that, but they also have fun mini game promotions and competitions.

Crown Coins Casino is one of the very few sweepstakes casinos in the US market with a well-developed VIP program. As a Diamond VIP, I get exclusive purchase offers, free weekly and monthly no deposit bonuses, private VIP competitions, cashback ("coinback") and gifts.

No other online casino treats me the way Crown Coins does. Not even close.

Mega Bonanza Casino is the site where you want to play if the high RTP Brilliant Gems slot machine interests you. And if you like the Wheel of Fortune slots, you have to try Brilliant Gems; you won't regret it.

We always visit Mega Bonanza every single day. In our case, it's not to play Brilliant Gems; it's all about the promotions, a place where Mega Bonanza excels as a casino.

Why do we love Mega Bonanza Casino?

This casino does something that I have never seen at any other sweepstakes casino. They allow players to repeat their hot offers. Some deals can be done three, five, ten, or even twenty times.

For example, there was once a $120 package with a fat bonus attached to it, and we did twenty transactions on it for a total of $2400 in deposits. If I remember correctly, we got 25% extra on the deal, giving us an extra $600 of sweeps coins. We've never seen anything remotely like this at any other site.

Finally, Mega Bonanza pays us quickly when we win. Gift cards arrive in a matter of hours (ten or less in most cases), and cash prize withdrawals hit our bank account in 1-2 business days.

Fortune Wheelz Casino is our top pick if you want to play the high RTP Coin Trio copycat slot machine with a few extra bells and whistles, Rich Piggies 2. Fortune Wheelz has an incredible slot machine selection, now that they have added top titles from Pragmatic Play to their library.

Why do we love Fortune Wheelz Casino?

We love that Fortune Wheelz takes the "no purchase necessary" element of being a sweepstakes casino seriously. Instead of just one daily login bonuses, there are two; one is either free coins or spins (varies daily), and the other daily login bonus is a free wheel spin with coin prizes.

The deposit bonuses are great too. In addition to a nice first purchase bonus, we often see high percentage bonus offers that can occasionally be more than 100%. However, those 100%+ bonuses tend to be reserved for micro-deposits under $10.

We've cashed out twice here previously. Both times we had our winnings in two days or less. That definitely earns them high marks in our book.

Legendz Casino is one of the best places to play games in the Big Bass series of slot machines from Pragmatic Play, as Legendz has elected to carry the higher RTP versions of some of these games.

Legendz has some offerings that many other sweepstakes casinos don't have. For example, they are the only sweeps casino that we have reviewed that offers bingo, and they are just one of two that also offers a complete sportsbook.

Why do we love Legendz Casino?

One of the best features of Legendz is that their cashouts are nearly instant. If we withdraw via gift card or e-wallet, we often have our winnings within the hour. Bank deposit sweeps coin redemptions take a day or two.

There were a few occasions when we needed customer service. In each case, our questions were answered professionally and accurately.

Legendz also runs some great promotions, including prize drops that seem quite easy to hit, plus cashback offers on most Thursdays. We also see some nice deposit bonus offers in our e-mail from time-to-time.