Online Slot Machines

If you are looking for a site offering online casino slots, we highly recommend these casinos listed below. For anyone that wants to play online slot machines for real money these are our favorite casino sites. With upper-nineties slot payout percentages higher than most Vegas casinos, these government regulated free online slots sites accept players from around the world, and allow unlimited fun-play. If you're looking for online video slots, the following chart of casinos (updated December 6th, 2017) enable you to play free slot games - and with a minimal deposit - play casino slot games for money.

Free Play Dirty Martini Slots Free Play Caesars Empire Slots Free Play Aztecs Treasure Slots
Top Online Casinos CA,UK,Euro
no limit
 Online Slots Tournaments



JumbaBet Casino is the highest rated site here at OCS. The fact that JumbaBet Casino offers a wide range of real money online slot machines and freuent slots tournaments with low cost buy-ins, certainly plays a factor in giving this respected online casino earings its reputation as one of the the Best. However, it's their track record for providing exemplary customer service, fast payouts and and some of the best bonuses and ongoing promotions we've come across that makes JumbaBet a great casino to join - slots tournaments or not. That said, if you are indeed looking for an active U.S. friendly online slots tournament schedule with large winnings, low-risk, and moderate competition, JumbaBet Casino is our top pick. Sign up today to start receiving special coupons for receiving tournament chips, not to mention some great welcome bonus offers that include a 100% Slots Bonus worth up to $1,200 Free. We highly recommend JumbaBet Casino as a top online destination where you can play free online slots games or try your luck with their online slot machines for real money.
Click here to visit JumbaBet

Slotter Casino is the OCS top choice for providing mobile slots for US bettors. While players from around the world can access the 20+ selection of mobile enabled games here, there are just a handful of US-friendly casinos online that offer mobile casino games, let alone a decent selection of slot machines, including those with progressive jackpots. …..Aztec’s Millions…., for example, is a popular RTG slot machine consistently topping the $1 Million mark. Being optimized to render properly on cellular phones and tablets, means players can win thousands of dollars on a single spin with a mobile device at Slotter.

Reel Spin is fast becoming a popular Real Time Gaming powered online casino with U.S. players. The RTG software platform consists of 100+ online slot machines, that include traditional 3-reel machines, mutli-line video slots and progressive jackpot slots. Taking full advantage of this offering, Reel Spin offers a great selection of ongoing reload bonuses that can be used for wagers on slots, including daily specials with reasonable play-through requirements that can be claimed multiple times in a single day. New players are eligible for a $888 Welcome Package for use on slots wagers.



Slots LV is a Real Time Gaming powered, USA friendly online casino with an emphasis on the slots. To that end, Slots LV offers daily tournaments with prize pool winnings. The buy-in's for these tournaments are generally no more than $3, with $0.50 rebuys. Within the slots tournament section of the software platform (available in Flash and download), the date of the tournament, buy-in amount, status (registering or announced) and the number of players signed up is posted. The great thing about these slots tournaments is that the turnout isn't so much that heightened competition makes it more difficult to win money, and yet enough players do take part to make the prize pool the worth going after for a daily tournament.


Euro Palace's Slot Masters is our top choice for slots tournaments, period. As their name implies, Euro Palace caters to and is frequented by European online gamblers; So much so, slots tournaments with large, guaranteed winnings are the norm here, each week adding up to $32,000 in guaranteed prize money. Tournaments include exclusive freerolls, extender tournaments, one-shotter's, and reloads - each offering a daily selection that would keep a full time slots tournament player busy. There is a great Beginners' Guide tutorial (given by Tomb Raider Slots' Lara Croft, herself), which gives the full lowdown on the Slot Masters tournament scene at Euro Palace.

Mr. Green Casino is one of the largest no-download casinos in business today, and the #1 Rated UK/Euro Casino here at OCS. Hosting daily low-risk tournaments with guaranteed cash winnings, this is a a great online destination to have some fun playing slots - tournament style - yet keeping the competitive vibe down to a minimum. Truth of the matter is that most online casinos host slots tournaments as a means to milk as much money as possible from participating players. But not Mr. Green. Taking operator responsibility to the next level, Mr. Green Casino does not facilitate players getting in over their heads. The promotions and tournaments that take place are designed for player enjoyment, and have less overall red tape. Another reason why we like Mr. Green is that, being an integrated software platform, there is a great selection of casino games from Best Soft, Wager Works and Net Entertainment.

Following the record-breaking $1 Million "Grand Slam of Slots" last year, which was the largest online slot tournament ever held to date, All Slots Casino is back hosting several daily tournaments with guaranteed winnings in the hundreds and thousands. The popular $150 "All Day Loaded" real money online slot machine tournaments are now open to players. Read the OCS All Slots Review for more information.


While you could say that Las Vegas was built on the slots, in reality, Las Vegas was built on the House Edge, which is present for all casino games. Slots may not offer the opportunity for strategy, but they certainly facilitate entertainment and an opportunity to relax and take a mindless break away from the card tables. They also offer some of the largest jackpots to ever be won on the Web. If you play at an online casino listed on then you can playing comfortably knowing that you are playing at one of the absolute best of the best casinos on the web.

Online slots come in many shapes and sizes, the bulk of which are multi-line video slots. At online casinos, you are most likely to find a selection of three-reel single-payline slots and a host of five-reel video slots with twenty-something paylines or more. You will also get a fair selection of progressive jackpot slots from the leading software companies.

Depending on the online casino software provider, the overall selection of slots will vary. Microgaming certainly offers one of the largest selections, not to mention uniquely designed slots on the Web (see our new Microgaming slots reviews below). However, with innovative interactive features like those of Rival Gaming software, overall selection is obviously not the only factor in choosing an online casino to play slots at.

Just as if you were scouting out slot machines at land-based casinos, it is wise to pay attention to the payout percentages on the slots. Not all online casinos publish these (which should be prepared by independent, third party auditors), but of those that do, like eCOGRA approved casinos, the previous month's payouts for slots will be published. The competitive range is in the mid to upper nineties percentile. Also, don't frustrate yourself trying to find hot or cold slots. Contrary to some false rumors, slot machine payouts are not contingent on previous spin results.

Immediately below are in-depth previews of Microgaming Software's upcoming slot machine releases, which come out every month as part of Microgaming's "New Games Rollout" campaign. No other software developer releases, nor has as many slots in their portfolio as Microgaming. Immediately below these reviews you will find additional slots tips and updated slots news and articles.

Microgaming Slots Reviews:

Thunderstruck II...Offering 243 ways to win, Thunderstruck II represents the future in Microgaming slots. Loaded with bonuses and free spins, Thunderstruck II even offers a random jackpot of $2.4 million.

Mega Moolah...One of Microgaming's highest paying progressive slots, Mega Moolah offers a four-tier jackpot with a top prize value starting at $1 Million. Low stakes required for this 25-payline, Wheel-of-Fortune style slot.

King Cashalot...Affordable for any bankroll, King Cashalot has a fixed coin value of $0.05, nine paylines and up to five coins per line. Average jackpot of $500K.
Cash Splash...A popular progressive jackpot slot with five reels and fifteen paylines, Cash Splash has a fixed coin size of $0.20, resulting in a $3 wager to be eligible for the max jackpot.
LotsaLoot...A progressive jackpot video slot available as both a 3-reel or 5-reel machine with fixed coin value and max bet of $2.50
Tomb Raider...A 5-reel, 15-payline video slot with a scatter pay free spins feature awarding 3x winnings on all spins and high paying bonus round.
Bomber Girls...A 5-reel, 20-payline video slot with two scatter pay bonuses offering up to 150,000 coins in free spins and 40x winnings in the High-Low bonus.
Days of the Tsar...A 5-reel, 20-payline video slot with scatters, free spins, 2x multipliers and a gamble feature set during the times of Imperial Russia.
Lucky Shot...A 5-reel, 20-payline video slot with scatters, multipliers, free spins and a second screen bonus game more fun than the real driving range.

Additional Slots Tips

- The Volatility of Online Slot Machines
- Difference & Advantages of Online Slots & Vegas Casinos

More Related Slots News & Articles:

Slot Madness Casino Instant Play
Scientific Games Buys WMS in $1.5 Billion Deal
Largest Mobile Jackpot to Date at William Hill
Must Trigger Casino Jackpots on RTG Slot
Play Slots at Winning Online Casinos

Related Games:

Online Casinos for Real Money
Online Blackjack for Money
Craps for Real Money
Online Roulette for Real Money
Online Poker Real Money
Bingo for Money