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Best Online Slot Machine Games For May 2024

Online slot games are perhaps the most important component of any online casino experience. When you play at an online casino, you’ll have the chance to play the kinds of games you’d expect to see at real casinos in places like Las Vegas and Atlantic City, but with the added bonus of doing so without leaving the house. The best online slot games come with all kinds of different themes, including everything from epic adventures to cute animals! Lots of slots come with special features like bonus rounds, free spins, wilds and multipliers, so your play will always be interesting. Keep reading to find out about some of the best US slot games, plus how you can play, and the kinds of bonuses to look out for at real money online casinos.

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Best US Slot Games With Free Spins

Free spins are one of the best special features you can expect to find when you’re playing online slot machines. You’ll trigger free spins when you land certain symbols on the reels, for example, three of the special “scatter” symbol for that particular slot. Free spins rounds will award you with a certain amount of free rounds at the same value as the spin that triggered them, and sometimes they come with additional features like multipliers. These are some of the best free spins slots out there. Sign up at one of the below casinos via Bookies.com so that you can start playing online slots for real money.

Dead or Alive

Dead or Alive is a wild west adventure game from NetEnt, featuring five reels and nine paylines. To trigger the free spins round, you’ll need to land three or more scatters, and then you’ll be awarded 12 spins that come with a multiplier of x2, and can be re-triggered.

If you want to play Dead or Alive (or its sequel Dead or Alive II), you can head to DraftKings casino, where you’ll find it amongst the selection of hundreds of real money slot games, including exclusive titles and progressive jackpots. 

Gonzo’s Quest (Caesars)

Gonzo’s Quest is definitely one of the best slot games out there. Brought to you by NetEnt, this is an ancient jungle adventure, featuring five reels, 20 paylines, and a special avalanche feature that can award you with a multiplier of up to x5.

You can play Gonzo’s Quest at Caesars online casino, and - as expected from a household name like this - when you do so you can expect a fantastic experience whether you play on desktop, mobile or app.

777 Strike (FanDuel)

If you love classic slot games, 777 Strike by Red Tiger Gaming is for you. Landing three scatters will trigger seven free spins that can be re-triggered for up to 21 free spins!

You can play this, plus all sorts of other classic slots and themed slots at FanDuel.

Cleopatra II (BetMGM)

There are dozens of Ancient Egypt-themed slots out there, but Cleopatra II is one that does it particularly well. Brought to you by IGT, it’s a sequel to the original Cleopatra game and comes complete with wilds, multipliers and a free spins round. Land three scatters to trigger up to 15 free spins, and if you land more scatters you could end up with up to 50 free spins!

You can play Cleopatra II and a whole range of other IGT games at BetMGM. This is one of the best online slots sites for US players, and offers both a desktop and mobile website, as well as a fully optimized app experience.

Bonanza (DraftKings)

Big Time Gaming’s Bonanza slot was one of the first Megaways slots, opening up a whole new world of ways to win. In this game, the number of ways to win is always changing, plus there are special “carts” that add more symbols to the reels. Four gold scatters award you with 12 free spins, and they come with an increasing multiplier that has no upper limit.

DraftKings is known for its fantasy and sports betting section, but it also offers lots of different casino games, and you can enjoy tons of Megaways slots like Bonanza when you play here.

Space Invaders (BetMGM)

Space Invaders is a retro-style slot game from Inspired Gaming. While it has the look and feel of a classic arcade game, it still comes with top slot game features like modifiers and a bonus wheel that can reward a number of different special games like a free spins round and a “mega reel” free spins round.

As Space Invaders isn’t made by one of the biggest game providers, it’s found at fewer online slots sites, but the place we’d recommend you to play is at BetMGM online casino.


If you’ve played at an online slot casino before, chances are you’ve heard of the Starburst slot - it’s undoubtedly one of the most popular NetEnt games out there. A trusted favorite since 2013, Starburst comes with 10 paylines, expanding reels and re-spins.

Caesars casino is our favorite place to play Starburst because when you’re done, you can go ahead and explore their amazing selection of online slots, table games and so much more.

88 Fortunes Megaways

Created by SG Digital, 88 Fortunes Megaways can have up to 117,649 ways to win, as the number of symbols that appear on the reels changes with each spin. There’s a free spins round that can award up to 10, 12 or 15 free spins, with a multiplier of x6, x4, or x2.

FanDuel isn’t just a fantasy sports website. It also has an amazing casino offering, where you can find a huge array of slots, including 88 Fortunes Megaways. 

Play Slots for Real Money at US Online Casinos

The best thing about playing slot games at a trustworthy online casino is that you’ll have the chance to win real money! Different slot games come with different levels of volatility (how often wins are triggered) and different RTP (the amount of money staked that should return to players over time), so it’s important to know a bit about the game before you play. Some online slots sites will also allow you to play the games in “demo” mode, which means that you can test them out for free before you play for real money.

If you’re going to be playing online slots at your casino of choice, you’re definitely going to want to claim a bonus to help you get started. Most online slots casinos offer something special for new players upon sign-up or first deposit, and when you sign up via a link here at Bookies.com, we’ll make sure you get an amazing offer. Most online casino bonuses either take the form of free spins or a matched deposit bonus on your first deposit. We’ll go into more detail about the different types of bonuses below.

US Online Slots Bonuses

Free Spins

Free spins are really attractive both for new players and existing players at real money online casinos. Essentially, you don’t need to take any action to get these free spins - they’re either awarded when you sign up for your new account, or you might get them as a special treat if you’re a regular player. Free spins are usually awarded on a selected slot or a few selected slots, so this is a great way to try out games you might not have played otherwise.

Free spins usually come with some terms and conditions, so it’s always a good idea to ensure that you’re familiar with these. You will probably need to meet wagering requirements, and you might only have a certain amount of time to use your spins.

Bonus Games

Bonus games are very similar to free spins, but you’ll usually need to make a deposit in order to receive them. Sometimes there’s a straight amount that you need to deposit to get a certain amount of spins, and other times there might be tiers, and if you deposit more you’ll get more of the spins. These bonus spins might also be given out over a certain period of time, for example when you log in each day for five days.

Bonus games tend to have the same kinds of restrictions as free spins, for example when it comes to wagering requirements and time restrictions.

Deposit Bonus

A deposit bonus is definitely the most popular type of online casino bonus you’ll find - in fact, the majority of online slots casinos offer new players some sort of match to enhance their first deposit. The way this usually works is that you’ll sign up for your new online slots casino account (for example through a link you’ll find here at Bookies.com), and make your first deposit to get your bonus.

You might need to either apply a promo code or opt-in at the cashier stage and then your bonus should be credited automatically. It’s important to read the terms and conditions that come with your deposit bonus - for example, you usually need to meet wagering requirements by rolling over the bonus a certain amount of times. There might also be certain slot games excluded from the wagering requirements (usually high RTP slots and progressive jackpots).

No Deposit Slots Bonus

A no deposit bonus is a small amount of bonus credit that you’re given without needing to make a deposit. You might be awarded $5 or $10, which you can then go away and use to play on slots of your choice. Although offers like this might come with exclusions and wagering requirements, they still give you the choice of slot games to play.

How to find New Slot Games With Online Bonuses in the USA

The majority of US online casinos offer a generous welcome bonus for new players, that you can use on online slots. These offers can change pretty often, and some online casinos offer bigger bonuses than others, so it’s important to analyze the bonuses before you sign up for your online casino account. Here at Bookies.com, our team of experts regularly evaluates the bonuses from online casinos, and we’ll give you exclusive offers when you sign up through a link you’ll find here. The best way to find the best bonus is to keep coming back and checking what’s available here.

How to Play Slot Machine Games

Playing online slot games couldn’t be easier. While there are a number of elements that vary between different slot games, overall the basics are pretty similar.

The first thing to do when you open up the slot game is to have a brief look at the paytable. This will tell you about the number of paylines, symbols to look out for, and any special features that you can trigger.

Next, you’ll need to set your stake. This is usually done on the main game screen, and you’ll be able to select stakes that range from as low as 10c a spin, to as high as $100. Most slot games have a fixed number of paylines, but some do let you adjust the number when you’re setting your stake. Just remember, the more lines you’re playing on, the bigger your chance of a win. Aside from paylines, the other factor affecting your stake is the coin value. So for example, if you’re playing a 25-line slot at a $1 coin value, that means you’re playing for $25 per spin (which you probably won’t be doing if you’re just starting out!)

In most slot games, you’ll trigger a win by matching symbols on adjacent reels from left to right, along the paylines. Some symbols will be of a higher value than others, thus triggering bigger wins. Most slots also have special symbols, for example wilds can substitute for other symbols, and scatters are likely to trigger a special bonus round.

Online Slot Games Bonuses Terms and Conditions

If you see a generous welcome bonus and plan on claiming the online slots bonus, it’s important to be aware of the terms and conditions before you go ahead and claim. You can find these attached to the promo on the online casino site, or within the bonus terms section in the footer. These are some of the most important terms and conditions.

Wagering Requirements: Almost all online casino promotions like free spins and deposit bonuses will come with wagering requirements. For deposit bonuses, this generally means that you need to wager the amount of bonus a certain number of times before you can withdraw winnings - this can be anywhere from 30x - 70x. For free spins or bonus spins, you’ll probably need to roll over your winnings a certain amount of times.

On some occasions, some real money slots sites might give you a small number of free spins with absolutely no wagering requirements, so anything that you do win is totally yours to withdraw.

Time Limits: The time limits of an online slots promotion define how much time you’ll have to claim the promotion and use the bonus. For example, if you’re a brand new player, you might have a limited time (like 7 or 14 days) to claim the offer, and thereafter you might need to use your free spins or bonus within another 7 days. Sometimes you’ll also be given a time limit to meet the wagering requirements.

Win Limits: Some online casinos put a limit on the winnings you can get from bonus offers. Quite often, if you get no deposit free spins, you might only be able to win a total of $50 from them, and even matched bonus offers sometimes come with a maximum win. You can find all of this info within the terms and conditions for the offer.

Game Restrictions: If you get given some free spins or bonus games, chances are you won’t be able to use them on any games you want. The offer will clearly lay out which game(s) your spins are valid on, and as soon as you open up the game, you’ll be able to play.

Game restrictions also apply to wagering requirements. Usually, slots play is valid for working towards wagering requirements, but there are almost always exclusions. For example, if you're playing on very high RTP slots, progressive jackpots, or sometimes games by certain providers, this might not count at all towards wagering, or it will count very little. Live dealer and table games are also often excluded.

Withdrawal Limits: The first limitation put on your withdrawals is that you’ll always need to meet any wagering requirements before you can withdraw. Once you’ve done this, you’ll also need to abide by the usual withdrawal limits of the online casino where you’re playing. For example, some online gambling sites require that you withdraw at least $10 or $20 at a time. There also might be limits on the upper amount you can withdraw either per day, per week, or per month. This is usually in the thousands, so you don’t need to worry about it unless you have a seriously huge win.

Frequently Asked Questions

How do online slots work?

To trigger a win on an online slot, you’ll generally need to match symbols on certain paylines, though some games have different rules. Games use Random Number Generator technology to ensure fairness. Lots of slots come with special features like bonus rounds, free spins, wilds and multipliers, so your play will always be interesting

How to play slots online?

If you want to play online slot games, you’ll need to sign up for an account at one of the best US online casinos, like the ones you’ll find here at Bookies.com. Then simply make your deposit and start spinning.

Are online slots legal in the USA?

Online slots are a pretty recent addition to the market in the US, and they’re only legal in certain states. As long as you’re located in any of these states, you’ll have no problem playing slots at licensed online casinos.

Can you play slots online in the US for real money?

If you’re playing at a trusted US online casino like one of the sites we recommend at Bookies.com, you’ll be able to choose your preferred deposit method and safely deposit money into your account and play slots for real money.

Where to play online slots?

Players in the US can choose from a wide variety of online slot casinos, but the options might be a bit different depending on your state. Online slots are a major component of online casinos like BetMGM, Caesars and FanDuel.

What US online slots pay real money?

Any online slots that you play at a licensed US gambling site have the potential to pay out real money. Some of the best slots we’d recommend include games from top providers like Gonzo’s Quest, Starburst and Book of Dead.

How to get the latest slot games offers?

The best way to find out about the best online slot game offers - like deposit bonuses and free spins - is to visit us here at Bookies.com, as we’ll always bring you the best offers at top real money US online casinos.

Can you win money playing online slots?

There’s never a guarantee that you’ll win while playing casino slots online, but if you choose a high RTP slot at a legit online slots casino, you do have a chance at bagging a win while playing real money slots.

About the Author

Bookies.com Staff for Bookies.com
Bookies.com Staff