Best Slot Games in USA

There are thousands of slot machine casino games to play for free or real money. But how do you sort the great titles from the ones with poor software and lousy payouts? At SlotSource.com, we have selected some of the best casino slot games to play on your home computer or mobile device. Choose from classic slots or the latest 3D titles. You can even take a shot at a multi-million dollar progressive jackpot and the chance to win big.

How We Picked the Best Casino Slot Games

We adhere to strict criteria when selecting the top slot machine online games. We play real money slots when compiling our reviews. That way we can really test out the gameplay, bonus features and overall gaming experience. Here's what we look for:

Reputable Slots Developers: Our SlotSource.com team does a full check on game providers and leaves nothing to chance. Does the developer have a full license and a good reputation for reliable software? If a provider has a poor record, we'll tell you.

Security and Licensing: The best casino slot games will be tested for fairness before they hit gaming sites. Slots game providers should be licensed and their software should be regularly audited.

Software and Gameplay: We give every video slot a thorough road test to ensure it is smooth and fun to play. Themes should be interesting and there should be no glitches or lags.

Mobile Compatibility: You should be able to play all modern video slot games on a range of devices. Whether you're playing on an iPad, Google Nexus or Kindle, you should be able to access great mobile-optimized slots.

Graphics and Sound: Slot games should be pleasing to look at, and the music and sound effects should add atmosphere. Slots will be marked down if they fail to impress. Simply put, gaming experience matters when playing video slot games.

Bonus Features: Great online casino slot games will offer a range of bonus features. Wilds and scatters should be included as standard, but a generous free spins round or progressive is an advantage.

RTPs and Payouts: We always check slot games for RTP (Return-to-Player percentage). You can find the RTP in the slot paytable - the higher the RTP, the better the long-term payouts.

Variance and Volatility: Variance, or volatility, is the regularity with which a slot pays out. Volatile slots pay out big prizes but they are infrequent. Low-volatility slots pay small cash prizes more often. You can usually work out the variance after a period of play. Our team tests all the recommended slots at SlotSource.com to see if they have high or low volatility.

There are thousands of top slot machine casino games to choose from. So how do you seek out the very best releases? To start, choose a theme and game style that's right for you. You can play a game set in ancient Egypt, watch footage from a Hollywood movie or battle against aliens to win the jackpot.

After you've decided on a theme that interests you, check out the slot's mechanics and payouts. The paytable will give you full information on what the jackpots are and how the slot bonuses trigger.

The paytable can also give you an indication of a slot's volatility. The wider the gap between top and bottom jackpot, the more volatile a game is.

And if you love jackpots, a big progressive slot could be for you. Progressive jackpots are made up of small portions of individual bets. They can be triggered at random or by playing a special bonus game.

Progressive slots are volatile but they are the only online slot games that give you the chance to win million-dollar jackpots. All of our top-rated casinos have a selection of great progressives.

At SlotSource.com, we only rate and recommend the best slot sites for online games. We suggest signing up to multiple casinos to give you a wide selection of slots and bonuses to enjoy.

Is it illegal to play casino slot games online?

No, it is not illegal to play slot games, however not all US states have legalized real money online casinos. You can normally find free-to-play casino slot games that are legal online no matter where you live.

How do online casino slot games pay out?

Online slots consist of vertical reels containing symbols. You win a payout whenever you match symbols horizontally, vertically or diagonally (depending on the game). They are called paylines. You can also win real cash prizes by landing scatter symbols or by triggering a bonus feature like free spins, and multipliers can add to your winnings, too.

Are online casino slot games safe?

At SlotSource.com, we only recommend legal and safe online slots from licensed and regulated providers. Reputable software developers will have their games regularly audited for fairness and return-to-player percentages. When you are playing slots and online casino games at sites reviewed and recommended here, you can be rest assured they are legal, licensed and regulated.

What payment options do online slot casino games accept?

At the best slots games sites, you can fund your slots using a wide range of payment methods. The virtual prepaid card Play+ is a terrific option, as is PayPal and other e-wallets. PayPal is probably the most popular e-wallet out there and you can find all the slots with PayPal on Slotsource. Bank transfers are great for high rollers and VIPs. Most sites accept credit and debit cards, but the success rate of those transactions is only about 50 percent because some financial institutions still wrongly block them.

How do I deposit to play slot games?

To make a deposit, visit the cashier and select a banking method from the menu. Enter your card number or e-wallet address and the amount you want to deposit. You can also make a checking account transfer via your online banking page. You will also need to enter your account password. Your funds should then appear immediately.

How do I withdraw from casino slot games?

To withdraw funds, go back to the casino cashier page and select your preferred banking option. Most U.S.-facing casinos will only allow cashouts to e-wallet, prepaid card or bank account. You will also have to wait 3-7 business days to receive your funds.

What are the best slot machine online games?

The best online slots are games that come from reputable software developers. They should have tested RTPs and Random Number Generators, and should be entertaining, exciting to play and give everyone a fair chance at winning.

Are slot games fair?

The best casino slot games are regularly audited to ensure their RNGs are fair and their payouts accurate. Independent testing bodies such as eCOGRA supply certificates to online casinos, proving that games have been tested.