Free online casino slot games for fun. USA Online Slots Casinos - Best Casinos for Online Slots USA

Online Slots are found at every online casino on the Internet. In terms of games selection, it’,s the virtual slot machines offered which represent the main differences in game selection. USA online slots offer hundreds of games with a myriad of different features. Games are touted for their features, so this slots guide helps beginners make sense of it all. Online slot casino.

This article provides basic tips to play online slots, shows you how to choose a game, details the types of slots and features, briefly goes over the history of slot machines, and ends with a section of frequently asked questions. Once you finish reading, you should have a basic understanding of how online slot machines work.

Best Online Slots Casinos

Basic Tips for Online Slots

Brand new players to USA online slots need to understand a few basic ideas about gambling. First of all, you are not likely to win in the long run. The house edge gives the casino the advantage on virtually every bet. Over time, the house edge assures that players lose more money than they win.

Imagine betting someone on the results of a coin toss. If you win, you pay $50. If the opponent wins, they pay $45. Over time, you’,ll lose money on this proposition.

There are basic ways you can increase your odds of winning in USA online slots. Making the maximum bet is generally the way to get the best payout. Taking advantage of the welcome bonuses and reloads also helps. Many websites now offer slot-specific bonuses and these should be tapped every chance you get.

Shopping around for online slots in the USA is the best way to find better odds or a better experience. Shoppers who visit more stores find better bargains. The same applies to online casinos. You don’,t have to buy everywhere, but shop around by doing research and you will eventually find the best online casino. To find out about more helpful suggestions and tricks, make sure to read our tips for playing slots page.

US Online Slots Casinos

USA online slots casinos accept American real money players. United States online slots casinos offer large welcome bonuses, along with massive slots-only bonuses. US-friendly sites support the U.S. dollar and English language, while most have VIP rewards clubs for loyal players. These USA online slots casinos support the most common forms of payment, including Visa, MasterCard, American Express, and Bitcoin. When it’,s time to withdraw, they make smooth transfers to American banks and credit card services.

International Slots Casinos

International slots casinos accept players from most countries outside the United States. The software companies which support real money online slots receive support from brands like NetEnt, Microgaming, and Playtech. This provides a wider variety of slots titles, including the most famous licensed slots, the biggest progressive jackpots, and the most advanced cinematic 3D slots. Players can expect to encounter a wide variety of deposit methods and licensing authorities.

Online Slots Casinos Deposits

Players can make online slots casino deposits using a variety of methods. Credit cards like Visa, MasterCard, American Express, and Discover Card are available at many USA Online Slots Casinos as well as on the International sites. Bitcoin payments are becoming commonplace too.

Many online slots casinos support money transfer services like Western Union and MoneyGram as deposit methods. So are web wallets like Neteller and Skrill. The chances are good that you’,ll find your favorite deposit method at the best online slots casinos.

How to Choose a Game

Once you get to slots row, you might find the selection process confusing. Below is a how-to guide on choosing the perfect USA Online Slot game. We divide slots into three sections: those with the highest payout percentage, those with the biggest jackpots, and those with the most entertainment value.

One method for choosing USA online slots is to find the highest payout percentage. This is easier said than done, because most casino operators would prefer to keep their payouts a mystery. We can put these games in categories, though, according to jackpots, signage, and coin denominations.

Classic 3-Reel Slots

As a general rule, the best USA online slots with a fixed jackpot have a higher payout percentage. If you’,re new to slots row and wonder why some gamblers camp out on 3-reel classics like “,Red White &, Blue”, or the “,777”, slot machines, it’,s because they have high fixed jackpots. Essentially, those gamblers know they’,re getting a better deal with these USA online slots than the progressive players.

Along the same lines, slot machines with smaller screen, fewer graphics, or less “,entertainment value”, have higher payout rates. The idea is that good USA online slots don’,t have to advertise as much. Also, designers and casino owners would prefer that players search for the better machines.

Higher Denomination

High rollers get better deals. As a general rule, the bigger the coin denomination, the lower the house edge. Casino owners want to encourage high stakes players to gamble at their venue, so they offer better payout rates to premium players and high rollers.

If you want the highest payout percentage, look for the online slot games with fixed jackpots, little fanfare, and the highest coin denominations you can afford. Do not wager more of your bankroll than you can stand to lose comfortably. If you overspend to get better odds, you’,re making a bad financial decision.

Players who prefer the highest payouts often wonder whether to place the max bets. Most USA online slots encourage players to make the max bet by offering a bigger jackpot on the max bet. This is the “,economy of scale”,, where the cost goes down as the numbers increase. On the other hand, casinos increase the theoretical return when the coin denomination is higher. If the jackpot pays out a higher percentage, make the max bet. If not, then lower your coins wagered and increase the denomination.

Progressive slot machines are going to be the games with the largest jackpots. A progressive jackpot accumulates over time. Each spin which does not trigger the progressive feeds the pot by a little bit more. Progressive jackpot slots can be any size, but the most famous ones range into the millions (or tens of millions) of dollars.


MegaBucks holds 80% of the Top 10 slots jackpots in gambling history. When you hit a MegaBucks progressive jackpot, it’s going to pay out anywhere between $10 million and $40 million. This has spawned a whole array of imitators, which usually have the word “,Mega”, in the name. Examples include Megasaur, Mega Moolah, MegaJackpots Monopoly 3 Progressive, MegaJackpots Cleopatra Progressive, and MegaJackpots Cluedo Progressive. If it has “,Mega”, in the title, it’,s likely to be one of the largest jackpots in the casino.

Other Progressive Slots

That being said, many other fine progressive slot machines exist. Wheel of Fortune Slots from IGT pays out over forty $1 million-plus jackpots every year in Nevada alone. These are not the biggest prizes in the industry, but it is the most popular game, because it offers a high frequency of hits. Of this particular licensed brand, Wheel of Fortune Super Spin has the highest jackpot.

Analysts like me have mentioned many times that the progressives have some of the lower return rate among the slot machines. It doesn’,t matter. Players love the progressives. Gamblers play the lottery for the same reason: the idea of hitting a life-changing jackpot.

The factors above do not work for everybody. For some, getting the best deal or competing for the biggest prize isn’,t everything. Many players just want to be entertained, and that’s a good thing.

Healthy gamblers see their gaming as a form of entertainment. The house edge and the sustainable losses they incur are seen as the price of buying entertainment. Taken in that light, finding a machine with the highest payout percentage is like buying the cheapest possible concert ticket.

Some gamblers don’,t mind playing at a more expensive USA online slots game, if it provides them with the most entertainment. These players tend to prefer the best graphics, the most exciting game features, or the most nostalgia. 3D slots are a favorite with this group. So are licensed slots.

Types of Online Slots

Below is a description of the types of games you’,ll find at the best USA online slots casinos. A slot machine might be described as two or more of the sub-types listed below. For instance, a video slot might be a progressive slot and an interactive slot. We offer the definition of each, so you’,ll know what’,s being described.

Online Slots Jackpots

Jackpot is a loaded word in slots these days, because of all the different kinds of jackpots available. So let’s look at the various jackpots that you’ll find at USA online slots casinos, as well as what they offer.

Many slots have fixed jackpots, meaning the value always stays the same regardless of when the last time the jackpot was won. Most fixed jackpots are only worth between 5,000 and 10,000 credits, which means they aren’t usually big draws.

These jackpots grow with every qualifying bet that’s made and will keep growing until somebody wins. No other feature has more attractive power than the progressive jackpot. Gamblers play these games, even though they know the progressive slots have a higher house edge. The reason is the same reason people play the lottery: they get a chance at a life-changing jackpot.

The majority of progressive jackpots are only worth around $8,000 to $20,000. But some jackpots, like the Mega Moolah (online) or Megabucks (land based) prizes, can be worth millions of dollars.

Obviously, it’s exciting to think about playing for this kind of cash. But keep in mind that you often have to make a $1 side bet in addition to your original stake to qualify.

Almost every type of USA online slots jackpot is hit through a certain winning combination. A random progressive jackpot, on the other hand, can be hit on any spin, regardless of your spin result or bet size.

While you normally don’t have to make a side bet or wager a certain amount, you have a better chance of winning the random progressive jackpot by making a higher bet.

Even still, these prizes offer additional excitement for players who can’t afford to play a Mega Moolah or Megabucks type game.

Free online casino slot machine

IGT has been introducing multi-level progressive jackpots in the last few years. The typical way these work is a 5-in-1 progressive jackpot system. The lowest-level progressive might be a $10 jackpot. The next level might be a $50 prize. The next progressive might be worth $100 to $200 while the fourth level might be worth $500 to $1,000.

These are independent of each other though one might feed into the other. That is, these prizes might work like the “Multi-Level Pick a Box” bonus feature, where winning one prize might allow you to advance to the next progressive level. In most cases, whether it’s a 4-in-1 or 5-in-1 progressive, the machine also offers the big progressive, which is worth 6-figure or 7-figure amounts and is 100% independent of the others.

Games like Amaya’s Forrest Gump and Daub Games’ Grease offer multi-level jackpots, meaning there are actually several jackpots rolled into one. For example, Grease has you scratch off spaces on a card, and the first four jackpot spaces that you reveal determines if you’ll collect the small, medium, big or top jackpot.

Land-based casinos offer linked or networked slot machines. Like the Internet networks multiple computers together, the link progressive jackpot links together slot machines for the sake of feeding the same pot. This allows a machine’s jackpot to grow faster and larger. The local area networked progressive tends to be all the machines in a bank of games, or all on one slots row. The biggest jackpots exist on the wide-area progressive network.

Brick-and-mortar casinos offer some slot machines which are linked to slots in other casinos, often in other states or countries. These are the wide-area progressives, which grow the fastest and biggest of all. The MegaBucks Slots network is a good example of this. Every MegaBucks slot machine in the State of Nevada feeds into the same pot until someone wins the prize.

Online Slots Reels

The number of reels in a slot machine is important because this greatly affects how many winning combinations and features a game can offer. Up until the 1970s, all slots were 3 reel games that operated on mechanical reels.

But ever since the Fortune Coin Co. developed the first video slot in 1976, manufacturers have been able to add more reels, thus increasing the number of slots features. Below you can see what to expect from the varying reel amounts at USA online slots.

Sometimes referred to as classic slots, 3 reel games are usually among the most basic that you’ll find in USA online slots. True classic slot machines only offer one pay line and typically have no special slot features beyond a fixed jackpot.

The main reasons to play these games are if you’re just learning slots or if you’re nostalgic for old Vegas trips.

However, do note that you can find 3 reel slots with decent features and/or innovative concepts. Betsoft’s Ghouls Gold is one that we can think of because it has three different 3 reelers stacked on top of each other, with the first 3 reel set unlocking the above games.

The best and most popular online slots USA are almost always found in this category. 5 reel slot machines seem to strike the perfect balance between offering enough different payout combinations and slots features without overloading the player (see 7 reels).

Based on the popularity of 5 reel slots, you’ll see the biggest progressive jackpots offered through these games. You’ll also find that most of the latest USA online slots releases have 5 reels.

So unless you’re looking for a simplistic slots experience, like what you’ll find with 3 reelers, we suggest that you begin with 5 reels.

Among the features of online slots in the USA, a very small percentage of slot machines have 6 reels. This isn’t to say that 6 reel slots are inferior to 5 reel games, but as far as slots features, this variation is just not very popular.

Perhaps the reason why is because with an extra reel involved, these games leave less room on the side for background/theme artwork. Nevertheless, these slots can be just as fun as 5 reel slots since they offer good features and lots of payout combinations.

Examples of 6 reel slots include NetEnt’s Aloha! Cluster Pays and Realtime Gaming’s Lucky 6.

7 reels is one of the slots features that never took off. We don’t know of any 7 reel slot machines in land-based casinos, and there are only a small number of online slots in the USA with this many reels.

A couple of 7 reel slots examples include Barcrest’s Jackpot Jewels and Wager Gaming’s Lucky 7’s.

The good thing about 7 reel games is that they give players numerous pay line combinations. The downsides include that there’s absolutely no room on the side for background graphics, and some players may feel overwhelmed with so many possible payouts.

Few examples exist of developers going outside the traditional reel model when creating slots. However, Amaya’s recent Jenga slots game takes a different approach.

These USA online slots features can be considered a different game entirely, but rely on the same concept. Instead of having reels, Jenga is just like the Parker Brothers’ game in that it’s a tower shaped slot. Each level of blocks is considered a pay line, totaling 18 pay lines in all.

The main problem with Jenga is that it doesn’t offer much beyond the unique tower shape and good graphics. Nevertheless, it’s an interesting approach that other companies may expand on in the future.

Paylines in Online Slots

As discussed before, the earliest 3 reel slot machines only had one pay line. However, as slots features evolved, so did the number of paylines, to the point where some slots have dozens or even hundreds of paylines.

Here’s what you can expect from USA slots online, based on the number of paylines that they have.

This is the oldest and most basic model that you’ll find in USA online slots, and single pay line games don’t offer many, if any, special features.

You must land symbols directly in the center reel for a winning payout in single pay line games.

The online slots in the USA are usually pretty cheap to play because you only use 1 3 coins per bet. In most cases, it’s to your advantage to play all 3 coins because there will be a favorable jackpot progression on a 3 coin bet.

Many players will find single pay line games boring after a short while because they just don’t offer enough extra frills.

This seems to be the sweet spot of online slots USA features for most players, especially since many 5 reel games feature 20, 25 or 30 paylines.

The nice thing about this range of pay lines is that you have more chances to win without spending a fortune to play.

Some 20 to 30 pay line slot machines force you to play every pay line while others let you adjust the amount down to just one pay line. But even when you’re forced to play every pay line, you can keep the coin size at one cent and only bet between $0.20 and $0.30 per spin.

We recommend the games with this feature because they improve the number of times that you’ll win and keep things more entertaining. But if you’re ever confused by how all the different paylines work, just click the help screen and you’ll be shown the different line combinations.

Casino slot games online

If you’re used to traditional USA online slots, you know that many of them only pay when symbols line up from left to right in an active pay line. However, a 243 ways game eliminates paylines and instead allows pay lines to be created as long as they’re in adjacent reels.

For example, the same symbol anywhere on reels 1, 2, and 3 could form a winning payout. If you’re familiar with scatter symbols, which we’ll discuss later, a 243 ways to win game basically makes any symbol a scatter. This make it one of the most enticing slots features available.

Examples of 243 ways slots include Microgaming’s The Dark Knight Rises, Immortal Romance, and Thunderstruck.

These USA online slots can certainly make for exciting play because you have a good chance to win on any spin. But the only downside is that it can be one of the slots features with the highest betting requirements. You usually have to bet at least $0.25 to $0.50 per spin, which might make low rollers uncomfortable.

These are the same concept as 243 ways slots, except that they feature 5 reels that are four spaces high (5×,4 grid), instead of the traditional 5×,3 grid.

This extra space above each of the 5 reels helps create 1,024 ways to win. Examples of games with this slots feature include Aristocrat’s Buffalo and Wicked Winnings III.

Just like the 243 ways games, these slots create additional excitement with the potential for many different payouts. But again, compared to other slots features, the minimum spin cost will be higher than most games.

Online Slots Bonus Features

USA online slots have bonus features programmed into them to increase their entertainment value. Bonus games offer animated cut scenes, music, and audio clips, but the features below affect the game mechanics and odds. When a bonus feature is encountered, it gives players a sense of accomplishment and the idea that something special is about to happen. Below you can get an overview of the most common. Additionally, if you feel like some terminology is confusing, make sure to check out the slots terms page.

These are the most appealing types of slots bonuses because they take you off the reels and into a different setting.

At the best USA online slots you’ll find all sorts of second screen bonus rounds like selecting positions on a treasure map, spinning a wheel, choosing what direction a character goes, guessing whether a number will be high or low, and randomly selecting items.

Some land based slot machines, like those by Bally Technologies, even offer interactive technology where you touch the screen to spin a wheel (U-Spin).

This variety is part of what makes second screen bonuses so fun because you never know what a game will offer until you start playing (or look at the help screen). And even the simple bonus games that merely involve spinning a wheel or selecting items can be fun.

So we highly recommend any slots you can find with second screen bonuses.

These two features were popularized by fruit machines in the UK and are still used in some USA online slots today.

Holding reels allows you to keep one or more entire reels in place while you spin again for bigger prizes. Nudging a reel causes symbols to shift in the reel and potentially create a big win.

Oftentimes, these two features are awarded from a win, but certain games allow you to hold or nudge reels at other points too.

Since holding and nudging give you some degree of control over the reels, they do add a little bit of skill to the equation. However, keep in mind that games with these features normally offer a lower return to play than most slots.

Those are the most common USA online slots bonus features. Aditionally, you can also find the following options while playing slots.

Coin Size: This allows you to adjust the amount that you bet on each pay line. For example, you might be able to switch the coin size from $0.01 to $1.00.

Coins per Line: Some slots allow you to put additional coins on each pay line, usually ranging from 1 5 coins per line.

Autospin: When turned on, this automatically spins the reels with your designated betting options. Some games let you auto spin the reels for up to 100 spins or more.

Max Bet: Quickly play the max number of paylines (and / or other options) by clicking Max Bet.

Stop Reels: Want your spin to end early? Just click the Stop button and this will speed up the process.

Double Up: Following wins, some slots give you the chance to double up your winnings by playing a mini game. While this sounds fun, these mini-games usually equate to no more than picking whether a coin will be heads or tails, or a card will be red or black.

Over time, new features and options are going to be added to the best online slots in the USA by software designers, in response to player behavior and industry competition.

Popular Online Slots Software

Sometimes, it helps to know about the software company designing the games you play at USA online slots casinos. Below is a brief selection of the land-based and online slot machine developers.

To get a thorough insight into the industry, and learn more about the companies that make your favorite slots, check out our Online Casino Software page.

Short History

The first slot machine was invented in 1895 by Charles Fey, a San Francisco area resident. This gaming machine had a liberty bell as its jackpot symbol, so it became known as the “,Liberty Bell”, machines. The German immigrant began marketing his Liberty Bell machines to local businesses until San Francisco’,s politicians passed gaming laws against them. Charles Fey designed them to pay out in fruit, bubble gums, and prizes instead.

Eventually, California laws became more stringent, so slot machines were outlawed in their home state. In 1931, the state of Nevada approved casino gambling, which gave slot machines a new life. They became a part of the gaming floor, though mechanical slots had only 3 reels and small jackpots, out of necessity. In the post-World War II casino boom, slot machines became a popular form of gambling but did not generate the percentage of revenues they do now.

It took the transition to electronic gaming machines to create the slot machine boom. The first electronic slot machine was released in 1979. By 1981, International Game Technology (IGT) was producing electronic gaming machines (EGMs) for casino floors. With the inception of random number generators (RNGs), the number of reels could be increased. So could the number of symbols on a reel, so the number of potential winning combinations increased exponentially. This allowed for bigger jackpots.

Electronic Slots

As the 1980s progressed, IGT led a revolution in slot machine design. Industry standards like slots clubs and progressive jackpots first appeared. So did the entertainment value of slot machines. This drove tremendous interest in slots row. As casino management began to realize they could offer EGMs with a higher house edge than the table games, casinos invested more money in their slot machine inventory. By the 1990s, games like Wheel of Fortune Slots and MegaBucks Slots were dominating the headlines with their million-dollar jackpots.

Online and Mobile Slots

These days, slots online represent 65% to 70% of the revenues casinos generate. A wide range of bonus features has been added to the game design while security systems have been improved to protect operators from slot machine cheats. Because they used RNGs for years before their inception, online slots, and mobile slots made an easy transition to the Internet. A wide range of online casino software developers now create the best USA online slots these days.

Free online casino slot machines

USA Online Slots FAQ

More than any other casino game, slot machines have more myths and misconceptions. To counter the misinformation, people need to learn the truth about USA slots online. Here are a few common questions that slot machine players ask. I might sound like a spoilsport in these answers, but slot machine gamblers need to hear the cold, hard facts before they play.

With thousands of different games available at casinos and online, USA online slots are the most popular casino game worldwide. In their most basic form, slots have three to five reels of symbols that spin when a player makes a bet and hits the spin button (or pulls the lever). The goal is to get as many of the same symbols as possible lined up. Different symbols on a slot machine will have different values, and some machines offer bonus payments and free spins.

When you walk into a casino, you will find two types of machines: Mechanical slots with plastic reels that spin mechanically, and simulated slots which are presented in computer graphics. These are sometimes also referred to as video slots. When you play online, you will find only simulated slots.

Casinos love USA slots online for several reasons. They are consistent, do not require a human operator, and rarely break down. On top of this, it is difficult for players to cheat at slots. The house edge is fixed and cannot be changed by the player.

USA Online Slots are very simple to play and require no real strategy, which is why they remain so appealing for players.

Although the process may change slightly from machine to machine, the basic way you play a slot is as follows:

Deposit bills or a voucher

Select the number of lines and credits to play per spin

Press the spin button or pull the lever

Win or lose based on the spin of the reels.

As you can see, playing a slot is very simple and it can be very entertaining if you choose a good game to play.

As we mentioned, there are thousands of options. Most machines differ by theme, but they are the same in operation. The only differences are the sounds, graphics, and bonus rounds. Slot machines will generally have either three or five reels with a number of pay lines or ways. Pay lines are combinations of symbols on different reels which can award the player a win.

Although some casinos still operate mechanical slots, most slots these days are fully digital. This allows for more immersive gameplay but does take away some of the romance of slot machines.

In some casinos around the world, you can also still play with coins and be awarded in coins when you collect or cash out. However, most casinos have moved to bills or vouchers, with cash-outs given in a ticket or voucher form that must be exchanged for cash at the cage or a ticket machine.

A recent trend is to base slot games on popular culture figures, performers, television shows or movies. So if you’re a Britney Spears fan you can play a Britney slot that has her music, face and other related symbols and features. You’ll also find Batman slots, Ellen slots, and many more.

Pay lines are symbols on different reels that award a win when combined correctly. They typically pay out from left to right, although some games will offer reverse pay line wins. Your wager will increase if you select more pay lines.

Some machines also have ways. These symbols just need to appear on the reels multiple times in any combination.

If you play one pay line it will usually be the center symbol on each reel in a straight horizontal line from left to right. Beyond that, most slot machines will have a small picture on them which shows you how every pay line works.

When playing a machine, the best strategy is to play all of the pay lines. If this makes the bet too large for you, consider dropping to a lower coin denomination or moving to a cheaper machine. The minimum bet amount is designated at the top of the machine.

Bonus rounds on slot machines offer a separate experience to standard gameplay. To enter a bonus round you’ll usually have to hit three of the bonus symbols on the completed slot face. This will start a round in which you make selections to win the greatest amount of cash. Some bonus rounds will be very entertaining with excellent graphics, while others will be simple with just one option or prize to reveal.

Some bonus rounds will award free spins instead of a cash prize. If you activate this type of bonus you’ll get a number of free spins at the same wager rate as your original bet. This can be very lucrative.

Many machines will have bonus rounds and free spin rounds, and some will have different types of bonus rounds to keep you entertained. Visit our casino bonuses page to learn more.

A slot tournament usually consists of a number of players playing a particular type of slot machine at the maximum bet for a set amount of time. The goal is to have the most number of credits by the end of the allotted time. The person with the highest number of credits at the end is the winner of the tournament.

Sometimes in a slot tournament, you may be assigned a certain number of credits which you can use to win, instead of unlimited credits.

You can enter slot tournaments through invitation or by paying. Casino player clubs will often invite their players to tournaments and offer cash prizes or free play for the top finishers.

A payback percentage is the theoretical amount of $100 you expect to have returned, due to the house edge. If the payback percentage is 95%, then you can expect to have $95 returned to you out of every $100 wagered. This is not certain, but probable. The payback percentage is an expected return, factoring in all mathematical considerations.

The hit frequency is how often a particular jackpot hits, or how often you can expect to hit a payout on machine. For instance, if the top jackpot hits every 250,000 spins, then the hit frequency of that jackpot would be 1-in-250,000.

If you’,re talking about the chances of having a winning spin, you add up the aggregate hit frequency of all payouts on the machine and come up with a figure. If you can expect a winning spin once every four spins, then the hit frequency would be 1-in-4.

The hit frequency is how much action a slot machine has. You can have a high hit frequency and a low expected return, depending on the size of the payout. You can have a low hit frequency and a high payback percentage, if the payouts are large.

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