Online Slots

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Best Online Slots in America 2021

Every online casino player knows the excitement of playing slots. It’s no surprise that slots are the most popular casino game at online casinos in America.

The simplicity of the rules, the variety of games, and the flexibility of playing on any type of budget are what make it a game for every type of casino player. 

Whether you're looking for free spins, bonuses, jackpots, free games, or just want to know how slots work, you’re about to learn all you need to know about playing online slots to win.

Why Play Online Slots and Is It Safe to Play Them? 

Are Online Slots Safe to Play in America?

Online slots are legal and regulated at a federal level in the United States. Right now you can play at an online casino legally in either New Jersey, Pennsylvania, and West Virginia. 

Random Number Generators

Modern-day slots are controlled by a random number generator (RNG) which is used to generate completely random number combinations. This controls the payback percentage for each slot machine. 

The RNG is programmed to have a specific payback percentage for its respective slot game. Usually, the more money the machine requires per bet, the higher the payback percentage will be. 

What Are Online Slots? 

Online slots are the virtual version of your typical slot machine and are the most popular online casino game on the web. These gambling machines have three or more spinning reels that display symbols.

The goal is to spin the reels and have the symbols match up to form winning combinations. In order to play, you would place a bet, spin the reels, and hope for the best possible winning combination.

Why Play Them? 

85% of online casino gamblers play slots nearly exclusively. Slots players are in luck when it comes to online slots. This is because:

  • Much better RTP on online slots (with many games at 98%!)
  • Generally higher jackpot payouts
  • Big bonuses available to claim
  • No need to wait for a machine
  • Huge variety of games 

Now with new casino technology, slots can provide even more entertainment for players and a much greater abundance of games with exciting graphics and special features.

Modern slots are the biggest draw toward US online casinos. 

Did you know?

RNG payback percentages are rarely ever changed due to the amount of work it requires to make these revisions. 

Slot Games that Fit Your Style

What to pay attention to when choosing a Slot game?

1. Theme 

You can find a number of slots to play just based on the theme of the game. For example, some slots will be based on a certain type of animal, like Cats, or maybe a rock band, like Guns N' Roses. There are even slots based on classic movies, like Baywatch! 

There are so many different themed slot games, it would be difficult for a player to not be able to find a slot that fits their style. 

2. Lookout for volatility

Learning about the volatility of the particular slots titles will show you how frequently you can expect the slot to payout.

A game's volatility refers to how much risk is involved with that game title. 

If you are aware of the volatility of the particular slots you wish to play, you will have an idea of ​​how frequently you can expect the slot to pay out and how to win on slot machines. 

Low volatility slots will hit frequently but have lower payouts, while high volatility slots will hit less frequently, however, will payout in much higher amounts. 

Right in the middle are medium volatility slots. These will pay out more often than low volatility slots but with smaller amounts compared to high volatility slots.  

3. Pay attention to RTP

RTP refers to the funds a player is expected to win back from a certain game over a predetermined amount of time. 

This percentage is a theoretical number usually used as a reference. The average RTP rate for online slots is 96% however, some online slots have extremely high RTP rates.

Types of Online Slots

You're going to find a huge selection of slots at any online casino you visit in America. These most commonly range from 3-reel classic slots, 5-reel video slots, and jackpot titles. 

Let's take a look at each one below. 

Number of Reels

Most online slots feature 5-reels, however, there is still a great selection of 3-reel slots as well. 

3-reel slots tend to be the most simplistic out of the bunch and will feature one to three paylines. 5-reel slots tend to be much more animated with numerous paylines available. 

You can even find slots with 7 reels or more! 

Game Type 

Classic Slots

3-reel slots or classic slots are very similar to the earlier forms of slot machines. These classic forms of online slots are not as common anymore now that they’ve been replaced with modern games offering more paylines and special features.

Tech companies are still creating modern classic slots, however, for those players who still enjoy playing 3-reel slots.

3-reel slots range from one to five paylines meaning there can be up to five different ways for the symbols to line up to form a winning combination. 

One of our favorite classic slots is 88 Fortunes, which features five reels, free spins, a jackpot round, and over 200 ways to win. You can find 88 Fortunes at 888 Casino or Unibet.

888 Casino
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Video Slots

Video slots and can offer many additional opportunities for winning combinations, making these games more exciting than the classic online slots. 

In the same way as classic slots, the paylines in video slots can be formed in a horizontal fashion as well as diagonally, along with additional formations on the screen. 

More extra features in video slots can include free spins, scatter symbols, multipliers, and bonus rounds. Extra features can potentially increase your winnings or at least earn you more opportunities to increase your winnings. 

Game provider IGT is known for supplying some of the best online video slots. Wheel of Fortune is one of the most popular video slots in the market now and features two bonus rounds that regularly see good wins, as well as a bonus wheel.

Triple Diamond also offers good payouts to players and features many multipliers, leading to big wins. Both of these games can be found at the majority of online casinos in the United States. 

Play both slot games at the following online casinos! 

Golden Nugget
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Progressive Slots

Progressive slots will build up a jackpot prize until a lucky winner hits it, and then the figure resorts back to the base. They come in all kinds of different shapes and forms, and can also include special features like free spins, multipliers, and wilds.

The jackpots are made from a percentage of the money wagered on the game. As more and more players put money into the progressive jackpot, the total grows until someone gets the winning combination. 

These slots can pay upwards of $1 million, however, the odds of actually winning are small.

A few of the most popular progressive slots in America are Mercy of the Gods and Divine Fortune

Borgata and BetMGM online casino even feature exclusive jackpot slots, like MGM Grand Millions

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Megaways slots are still new to the United States and come with a bit of a twist. Basically, these slot games give you hundreds of thousands of different ways to win by randomizing the outcome of every spin. 

Megaways feature six reels, with a maximum of seven symbols per reel. At random, the number of symbols changes every spin which creates multiple different ways to win every time you spin. 

You can play different Megaways at Golden Nugget online casino, including Monopoly Megaways and the new Wheel of Fortunes Megaways. This is just two out of the possible 15 Megaways available, just at Golden Nugget! 

Golden Nugget
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Bonus Buy Slots

If you've ever wondered if it was possible to fast forward right to the bonus round in a slot game, then bonus buy slots might be for you! These types of slots will allow you to buy your way to the bonus game for around 60x to 100x your initial wager. 

You will recognize the bonus buy feature as a large button usually displayed on the side of the game, with the amount it costs to buy your way through.

The most popular bonus buy slots in America right now include: 

Did you know? 

A Pennsylvania woman currently holds the record for the largest win from Divine Fortune in America! In 2019, after wagering just $1 on the game at PlaySugarHouse.com, she hit the jackpot of $533,239.70

How to Win at Online Slots

Online slots are much less intimidating than casino table games. There is not a huge deal of strategy involved. If you want to win the slot jackpot, you have to bet some money and for the most part, hope for the best. 

However, there are some slot tips that can increase your winning odds and help guide you to the best slots online in America. 

Check out our Reviews

If you want to find out more information on a specific slot, check out our slot reviews. We have new reviews weekly on the newest and most popular slots in the industry! 

Read about the slots features, bonus game, graphics, where you can play, and more. 

Be Aware of the RTP 

It is very important to familiarize yourself with the slots you choose to play. Different titles have different return-to-player (RTP) rates. One important aspect of winning at online slots is finding a game that lets you win the most. Look for slots with a high RTP percentage. 

Find Slot Bonuses

Another important aspect of coming out a winner in slots is through bonuses, promotions, and perks that the casino gives. Features in a slot game like bonus rounds and free spins can do wonders for your bank account if you’re lucky enough! 

Watch Streamers 

You can watch slot gamers on different streaming platforms play in real-time! This is beneficial for learning how online slots work and maybe picking up a few tips along the way. 

You can find a number of streamers to watch for free on Youtube or Twitch. 

Is There Such a Thing as a “Slot Strategy"?

Online slots are much less intimidating compared to table games. There is not a huge deal of strategy involved. If you want to win the slot machine jackpot, you have to bet some money and for the most part, hope for the best. 

However, there are a few steps you can take before making a real money wager that could increase your odds 

So how much are you willing to gamble? Knowing how much risk you are willing to take is an indicator of how much money you could walk away with. 

What kind of slots player are you? Are you someone who likes to go in big and take your chances at the progressive jackpot slots who are you okay will going in small and walking away with a bit at a time?

Once you have made this determination, then choose your slots accordingly.  

How do slot games work?

Slots come in different shapes and forms, but the basics for gameplay remain the same. 

  1. Place your wager amount per spin. You can set up auto-play for anywhere between 10 to 100 spins at a time.  
  2. Once the reels have stopped spinning, you will see a combination of symbols on one or more paylines. Depending on the combinations, you could be rewarded on the slot’s credit meter. 
  3. Your winnings will go into your account automatically while you play. Depending on the slot you have chosen, this could mean entering mini bonus games, or collecting free spins. 
  4. When you're finished, you can choose to withdrawal or exit the game instantly. You will not lose your winnings if you leave the game.  

Now, every online slot will feature paylines, symbols, and reels. However, a lot of slots even go the extra step and add features like wild symbols, scatters, and bonus rounds, to make the game more fun for users.

Let's take a look at what some of this stuff means:


These lines appear on the screen, showing a payout based on the winning combinations. Different slots games have different numbers of paylines which usually run from left to right.

In order to win, the player must match the symbols along an active pay line.


These symbols are found in slots games. They can be used in order to create winning combinations. Wilds come in different forms including:

  • Expanded wilds, which cover an entire reel.
  • Walking wilds that move around from reel to reel while the player spins.
  • Sticky wilds, which stay still and remain on the reels for a certain number of spins.


Normally, landing scatter symbols are what unlock the slots bonus game or it's going to pay out a large amount of cash. You'll need to hit at least a couple on the same payline, or it just acts as another normal symbol. 

Bonus Rounds 

Bonus rounds are an exciting feature offered by slots that allow players to increase their winnings substantially. You'll need to land certain symbols on the payline (depending on the slot) to unlock the bonus game and then will usually get a select amount of free spins to use. 

Bonus rounds definitely have the potential to make you a lot of money, however, it isn't guaranteed just because you have entered the bonus game. 

Practice for free! 

Online casino registration bonuses will give you free money to try online slots games. You can keep what you win, however, you will be required to meet wager requirements before cashing out. 

You can play slots with no charge in demo mode but will not be eligible to win any real money during this time. However, it is a great way to learn slots and practice them! 

Ultimately, all online casinos will offer a demo mode to their game library but some might require you to have an account first before accessing the library. You can browse through these casinos by visiting our online casino reviews!  

Note: If you wish to play for real money, please make sure that you meet all legal, regulatory requirements before gambling in an online casino. 

Slot Providers to Look For in America 

Slot providers supply online slot games to the operators of the online casino. These companies are responsible for the software, theme, and design of the online slot, including the RNG.

NeEnt and IGT are both powerhouses in the iGaming world when it comes to game providers. NetEnt is known for releasing slots with very high RTP’s and IGT has designed some of the best video slots in the market. 

There are also numerous other providers supplying casinos in America, including: 

  • SG Digital 
  • Ainsworth 
  • WMS
  • Microgaming

Take a look at our chart below to see some of NetEnt and IGT's most popular online slots. 

Slot Provider Game  RTP 
IGT Pixies of the Forest 2 98.8% 
IGT Wheel of Fortune  96.0%
NetEnt Blood Suckers  98.0% 
NetEnt Jackpot 6000 98.8%

Glossary - Learn the Lingo!


The lines the symbols fall on to create winning combinations. 3-reel slots always have at least 1-3 paylines, but slots with more reels can feature over 100 ways to win! See more here


Many online slots are linked to particular jackpots. Jackpots accrue over time and can eventually pay out millions. 

Free spins

Players can earn free spins during bonus rounds, giving them additional opportunities to win and increasing their winning odds. A multiplier is sometimes added to any wins accrued during the extra spins.


A slot game can feature between 3 to 10 or more symbols, and decide your paylines based on the combinations they make.

Besides the standard symbol, you will also see a bonus, scatter, and wild symbols. Different symbols result in different payouts. 


A special feature symbol that can turn into any other symbol in the game to get you as many winning paylines as possible. Often, wilds can not replace other special symbols, like scatters. See more here


These lucky symbols pay out big bonus rewards or activate bonus rounds which can lead to free spins or other rewards. See more here. 


All online slot games have the option to enable autoplay. You can choose to activate 10, 20, 50, 100, or more spins, with the click of a button. 

Reels The vertical lines of the slot that determine the outcome of the game. Like symbols, different reels will offer different types of payouts. 

These bonus features are found in certain games. Multipliers increase your winnings, multiplying them by a specified number. (x2, x5, x10, etc.)

Maximum Bet

The maximum bet is the highest amount of money you can wager on a single spin in slots. These can vary depending on the online slot game and casino. 

Minimum Bet

The minimum bet is the lowest amount of money you can wager on a single spin in slots. Like maximum bets, these can also vary depending on the platform you are playing on.

Land-Based Slot Machines

Just like online, slots dominate the floor at every land-based casino. The experience you get playing at a slot machine versus online, are completely opposite.

There are a number of luxurious casino resorts across the United States which have hundreds of slot machines to choose from, built using the newest technology in the industry. This includes flashing lights, big chairs, high-quality sounds, and graphics.

Payouts are instant, including for progressive slot machines where you could end up with a $1 million dollar check in your hand! 

Slot machines might seem like an easy game, but there's a lot more than what meets the eye. To be successful at a slot machine, it's to your advantage to know all about the game you're about to wager on.

Dominic, the host of the All American Casino Guide, breaks down exactly how a slot machine works and what you should keep an eye out for when choosing your machine. Watch in our video below! 

How Slot Machines Work

Watch our Beginners Guide to Slot Machines below! 

Follow Dominic from the All American Casino Guide as he goes over how to use a slot machine, and shows you how to win! Learn about your odds, unlocking the bonus games, how to win the jackpot, and more, below. 

Beginners Guide to Slot Machines

Slot Podcasts 

We have compiled a comprehensive selection of YouTube videos, and podcasts about slot machines and how to win the slot machine jackpot! Learn how to play slot machines and how these complex machines work. 

Find out how to win on slot machines by hearing these unique strategies from slot experts. Read and listen to interviews with the experts to learn slot machine tips and advice on the best slot machines to play. 

Click the links below to watch the videos and hear the podcasts. Watch as casino expert and author Steve Bourie, with other slot experts, answer the most common questions about slot machines. 


Online slots continue to rule casino libraries and remain a favorite for players all over the world. With so many variations of the game, players should have no problem ever finding a slot game that suits them.

Check back here to stay up to date on the latest online slots launching this year!