Why you can trust Gamble USA
Gamble USA strives to improve your online gambling experience. We aim to help you play safely, make informed decisions when gambling, and increase your betting knowledge through our guides.
We adhere to strict editorial integrity; our content may contain links to products from our licensed & legal US partners.
With the rise in legal online casinos across the US, online slots have become a massive source of entertainment for players.
Players can discover thousands of exciting online slot games to play remotely at their fingertips. You can play online slots with real money in the US or free slots in demo mode from your laptop, PC, or smartphone.
At Gamble-USA, we have everything you need to know on the best online slots from well-known and reputable developers. Each of our recommended slot machines is regulated and licensed in the US so that you can play online slots securely at legal casinos in your state. Our experts have written thousands of slots reviews searching for the top real money slots and free online slots with free games to improve your slot knowledge, and we hope to offer you some new slot suggestions to try.
In addition to providing an online slots guide, if you are wondering where to play online slots, we’ve got you covered. We have provided a list of the top regulated online slot casino sites where you can play classic slots online, real money slots with the latest bonus features like Megaways, and progressive jackpot slots.
Each online casino on this page is home to hundreds of exciting online slots games, all playable for real money. Read on to discover the best online slots to play with real money, and sign up today to claim your free spins and welcome bonus offers!
The Best Online Slot Casinos
If you are looking for a slot game providing excitement, unique bonus rounds, and innovative features, you will find that and much more at these real money slot gaming sites. Our top online gambling sites offering the latest online slot machines include:
$25 Free Play + $1,000 Matched Bonus
- Promo Code: GAMBLEUSA
- Awesome $25 free play
- Legal Online Casino
$25 Free Play + $1,000 Matched Bonus
$50 Free Play & $2,000 Bonus
- Excellent mobile app
- User-friendly design & games
$50 Free Play & $2,000 Bonus
$20 Free Play & 100% Bonus Up To $1,000
- Free play bonus
- Best games choice
$20 Free Play & 100% Bonus Up To $1,000
$2,000 Matched Bonus
- Bonus Code: GUSA (MI & WV) GUSAS (NJ)
- 500+ Casino games
- Amazing bonuses
$2,000 Matched Bonus
100% Deposit Match up to $1,000
- Bonus Code: CASINO1000
- Speedy payouts
- Licensed & legal US casino
100% Deposit Match up to $1,000
Looking to play online slots in the US? Then these five operators offer the best choice of slot games, bonuses, and promotions:
Slot fans in the US now have a fantastic range of licensed and legal operators available online. They offer the Las Vegas slots experience at your fingertips with an ever-expanding range of top-quality online slots. Playable on both desktop and mobile devices.
#1 BetMGM Casino
BetMGM Casino is the online casino of the world-famous MGM Resorts International. They are one of the most prominent and most well-known casino groups on the planet and pretty much own all the best hotels in Vegas. The best slots at BetMGM casino include classics such as Dead or Alive II (NetEnt), Book of Dead (Play’n GO), Cash Wizard (Bally), and Starburst (NetEnt). Additionally, DraftKings slots and FanDuel Casino slots offer numerous slot games, from Vegas slots, Penny slots, Megaways slots, Progressive Jackpot slots, etc.
Welcome Bonus: $25 Free Play & $1,000 Deposit Bonus
Read more: BetMGM Casino review
#2 DraftKings Casino
DraftKings may be better known for offering DFS and, more recently, sports betting, but they also have one of the best licensed US casinos providing a massive range of real money online slots. Some of the best DraftKings slots include Gonzos Quest (NetEnt), 88 Fortunes (SGi), and Bonanza (BTG). The games are provided by some of the best online slot providers, all presented in a simple and intuitive casino lobby. The range of real money slots is expanding quickly with over 700+ different games on offer!
Welcome Bonus: $50 Free Play & $1,500 Deposit Bonus
Read more: DraftKings Casino review
#3 Golden Nugget Online Casino
One of the best know names in the casino industry, the Golden Nugget Online Casino is the online provider of the world-famous Golden Nugget. They have one of the most extensive online slot collections available in several US states, with over 1000+ real money online slots in their slot lobby. Play all the favorite titles you would find at the Las Vegas casino right from your mobile or PC.
Make sure to check out superb online slots such as White Rabbit Megaways (BTG), Extra Chilli Megaways (BTG), 300 Shields Extreme (Nextgen Gaming), and some of the land-based classics like China Shores (Konami).
In our complete guide, you can read more about the full list of online slot titles, including our pick of the best slots at Golden Nugget.
Welcome Bonus: $20 Free Play & 100% Bonus Up To $1,000
Read more: Golden Nugget Online Casino
How We Choose Best Online Slots For Real Money
We don’t select the best online slots for real money at random or because we like the name. When you want to play slots online, there are various factors to consider. We recommend only the best online casino slots. We look for the points below when ranking and reviewing all online slot machine games.
You don’t want to risk losing money on a mundane slot game; as part of our slot game reviews, we lookout for unique graphics, usability, and long-term playability. Having reviewed online slots for over ten years, we can tell pretty quickly if a slot will appeal to real money players. Players also have the opportunity to test out the slot in the free play/demo mode if they are curious and want to check out how the slot plays.
RTP (Return to Player) Percentage
You will often hear the phrase ‘highest RTP slots‘ when delving into the online gambling world. All real money online slots have a return-to-player percentage (RTP). This refers to the return made to the player over a period of time (Money Wagered).
The best real money slots will have an RTP in the range of 95-99%. You can also view important payment information via the slot paytable. Additionally, some operators list this information within their FAQ or Help sections.
All real money slot games come with variance and volatility. Low Variance slots pay multiple small and frequent payouts. A High Variance slot may pay out more significant amounts, but there may well be longer periods with little or no wins.
The volatility is the amount a slot pays out. High-variance slots payout more but not as frequently. These style of slots will appeal to different players, so it’s a case of playing various slots and deciding whether you prefer low, medium, or high variance machines.
Licensing & Safety
Your money and personal details should always be safe whenever you play online slots for real money. Our recommended online casinos are all licensed in the US. The games are independently tested (RNG) and certified for fairness and theoretical RTP before they are even available to play online.
Types Of Online Slot Games
When choosing which slots to play online, knowing the various slot types is helpful. The differences between two slot games could have massive repercussions on the maximum win, jackpot amount, gameplay, and betting strategy.
To help you make the most of your real money gambling experience, we have listed the different types of slot games below.
Real Money Slots
If you select real money slots, you can win huge jackpots online. Wagers can be as small as a penny for low rollers or in the hundreds for those playing for higher stakes. All of the classics and best new slots are online, and players now have the ability to play on the go via mobile casino apps.
Free Slots/Demo Mode
Free slots or “Demo Mode” mean players can enjoy their favorite slot titles without risking real money. There is no compromise on the quality of the graphics and gameplay just because these are free slots.
A frequent myth is that these slots might be looser because they are in free play, this is entirely untrue. By law, the demo mode of any slot has to have the same RTP and play exactly the same as the real money version, a further reason to always play at licensed casinos where this can be enforced.
Consequently, they are the perfect option for players who want to try new titles to see if they are worth playing for real money or practice slot betting strategies.
Slot machines from the famous Las Vegas casinos have been given a virtual makeover. Vegas online slots offer players the same well-known slot titles they enjoyed in physical casinos but with better graphics and bonus games. Slot developers such as WMS, SGi, Bally, and IGT can all be found online. Titles such as Cleopatra (IGT), Raging Rhino (WMS), and Montezuma (WMS) are all perfect examples of a Vegas slot that can be played online.
Progressive Jackpot Slots
Players can try and win big with progressive jackpot slot games online. Every time a bettor makes a wager in this type of slot game, a small portion of the bet (RTP Contribution) gets added to a progressive jackpot until a player lands the winning combination. Once the Jackpot has been won, the Jackpot will re-seed at a specific value.
There are instances where these slot games can overlap; for example, some online Vegas slots will accept wagers from a penny. However, it is beneficial for players if they know what type of game they are playing to grasp how the game operates and ultimately improve their chances of winning. A player interested in the big jackpots found in progressive slots wouldn’t be that bothered with penny slots.
If regular reels and paylines are too simplistic, then seek out some of the fantastic grid-based slots, titles such as Fruit Party (Pragmatic Play), Jammin Jars (Push Gaming), and Gigantoonz (Play’n GO). These grid-based slots tend to play out like a puzzle game on steroids with real-money gaming attached, using cluster pays, tumbling reels, and avalanche mechanics.
If you find paylines confusing, then maybe look at the massive collection of 243-way way slots. Rather than having paylines, they pay in every “way” possible on the reels. You simply need to look for matching symbols in any position on the reels from left to right to spot the wins.
Recommended slots in this category are all from Microgaming, with Immortal Romance, Thunderstruck 2, Terminator 2, and Jurassic Park being top-quality 243-way slots to play.
Big Time Gaming re-invented online slots with the introduction and further licensing of the Megaways payline system. Random numbers of winning paylines are created on every single spin offering “winning ways” generally well over 100,000 ways. Slots such as Bonanza (BTG) and White Rabbit (BTG) proved so popular with slot players that now pretty much all of the top slot developers have licensed the Megaways system and produced their own unique Megaways slots.
Slot Game Providers
Software developers understand that players these days have high standards for online slots. Players nowadays expect immersive graphics and music, huge jackpots, innovative bonus games and features, and huge max win potential.
It is no surprise then that slot game providers are in fierce competition to create the next classic slot game. This has resulted in many players actively searching for specific game developers to discover new titles to play. If you find a slot you love to play, the chances are the developer has similar slots too. Several top slot developers have yet to reach the US fully in terms of real money gaming but keep an eye out for Play’n GO, Push Gaming, Relax Gaming, Novomatic/Greentube, and the insane range; from NoLimit City; to arrive!
However, some of the best slot designers in the industry already available in the US can be found below.
IGT (International Game Technology) is a massive name in the land-based slot machine market. Players will find multiple IGT online and mobile slots at licensed casinos in the USA. The company is responsible for classic games such as 7s Wild and Double Diamond. High rollers are also catered for with big stakes in games like Cleopatra Plus and Gong Xi Fa Cai.
Bally is one of the oldest slot machine manufacturers in America. Bally is part of the Scientific Games giant and supplies top-quality licensed games to prominent online US casinos. Some of the most popular Bally titles, adapted from land-based versions, include Anchorman, Cash Spin, and Quick Hit Super Wheel.
WMS Gaming/Williams Interactive provides entertaining and exciting slot machines to some of the best casinos in the world. Like Bally, WMS is a subsidiary of SG Gaming (Scientific Games). WMS is known for developing slot games such as Raging Rhino, Montezuma, Fire Queen, and Epic MONOPOLY II.
NetEnt /Red Tiger Gaming
NetEnt is a Swedish game developer that prides itself on offering unique and exciting slot games to over 300 operators. Gamers will know NetEnt for classic slot games such as Starburst, Gonzo’s Quest, Jack and the Beanstalk, and Jack Hammer. After acquiring the superb slot developer Red Tiger Gaming known for the outstanding graphics, you can now play slots worked on by both developers in Piggy Riches Megaways and Gonzo Quest Megaways.
Microgaming is one of the oldest suppliers of online casino game software and has a fantastic reputation in the iGaming industry. The company has enjoyed significant success with games like the Mega Moolah Jackpot slots and the popular 243-way slots such as Thunderstruck 2, Immortal Romance, Jurassic Park, and Terminator 2. While more recent releases have relied on smaller external development teams, they still produce top-quality online slots.
Nextgen Gaming slots tend to get distributed alongside WMS and SGi, but it is worth noting that have a range of superb real money slots making this a developer you want to add to your must-play list. Standout titles include 300 Shields and the more recent 300 Shields Extreme with a bonus buy option. Classic slots such as Medusa, Medusa II, and the more recent Medusa Megaways. If Sticky Wild slots are your thing, then take some time to explore the Gorilla GO Wild and Gorilla Go Wilder slots from Nextgen.
One of the best things about the advances in technology over recent years is the development of mobile casinos. Players now have access to their favorite casino games at their fingertips. This means bettors can play online slots for real money through smartphones or tablets. They can download a native app or log in and play via their web browser. Real-money casino apps are widely available, and you can also make deposits using a smartphone with e-wallets.
Mobile slots are different from online slots as they are designed to work on your specific operating system. The screen will be smaller, and players can access crucial information and the paytable with a finger swipe. We love playing slots on mobile devices; they are easy to access and make that commute a little bit more exciting!
Downloading a Casino App
The good news is downloading a mobile casino app is a straightforward process.
- Android: The Google Play Store has recently softened its stance on gambling apps. Previously, Android slot players would be required to download the app directly from the casino’s homepage (APK). However, they can now head to the Google Play Store and download from there. For most online casinos, you will need to run Android 5.0 or higher.
- iOS (Apple): The best online casinos in the US offer dedicated apps for the iPhone and iPad. Once you have signed up for your casino account, head to the App Store and begin downloading.
- Instant Play Casinos: Multiple regulated casinos allow players to play mobile slots through their browsers. Log in to your casino account through your mobile device and load up a game in your mobile browser. All real money slots are now programmed in HTML5 and work flawlessly on whatever platform you are using.
How To Play Online Slots
Online slots feature numerous vertical reels filled with symbols. In every game, the reels spin and will stop at any time, thanks to a random number generator (RNG). This is regularly checked and audited to ensure the games are fair. Players win money by lining up matching symbols on paylines that cover the reels. Typically the paylines run horizontally, although some games feature vertical or diagonal paylines or even Cluster Pays.
You must first choose your coin size and the number of paylines you want to wager on. Some games have fixed paylines where you will have to bet on all of the combinations. If you want to know more, then have a read of our online slots guide for some handy pointers and tips for playing.
Online Slot Bonus Rounds
The best online slot machines will have several bonus rounds and special features. These bonus rounds can be activated by hitting the required number of scatter symbols, or they can just be triggered at random. The most common slot bonuses include:
- Free Spins: Bettors receive several free spins, sometimes with a prize multiplier attached.
- Wilds: Wilds are the joker symbols that act as a wild substitution to all regular symbols present on the reels. They help to complete winning combinations across the reels. Wilds can have multipliers attached to them, act “sticky on the reels, expand to make wild reels, and numerous other special features.
- Pick ’em Bonus: With a pick ’em bonus, players can choose from various hidden symbols on the screen. Each symbol hides a variety of rewards, including cash prizes, free spins, or multipliers. Players should keep choosing symbols until the “Collect” or “Bonus End” sign appears.
- Prize Wheel: You may get lucky and win a spin of a prize wheel with free spins, multipliers, stake-based cash rewards, or even jackpot cash sums.
- Bonus Buy: A feature on modern real money slots that allows you to bypass a slot’s base game and instantly trigger the main feature. Bonus Buys can be expensive. They are generally stake-based, the cost to buy them reflects how volatile the bonus round could be! On average, they will be around 100x stake but can vary massively if the bonus round is very volatile and lots of special features are added. Approach these features with caution and have a good understanding of the slot before buying them.
The above bonus rounds present an excellent opportunity for players to improve their bankroll. Additionally, these rounds don’t just give you more chances of winning some cash, but they are also exciting and entertaining. When deciding which online slots to play, try and choose one that has a significant amount of bonus features.
Developers are constantly adding new and different twists to slot bonus features, the list of various bonus rounds could be endless, but we have covered the main types here.
Online Slots FAQs
What online slots pay real money?
Online slots that pay real money can be found at all of the online casinos we have listed in our guide. In total, they offer thousands of different slots that all pay real money.
As long as you play at a regulated and legal online casino, your money is secure, and you are gambling in a safe environment.
Are there any free slot apps that pay real money?
Online Casinos in the US such as
- BetMGM Casino
- DraftKings Casino
- Golden Nugget Online Casino
- Caesars Online Casino
- BetRiver Casino
All offer free slot apps where you can win real money.
Can I play slots for free?
You can play slots for free or in demo mode at most online casinos, some will require that you create an account before giving you access to the free play slots, this is done to prove that you are above the minimum legal age to gamble.