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We all know that slot machines are usually the most profitable part of the casino floor. More space is dedicated to slot machine gaming than any other category of casino game, from Las Vegas to tribal casinos to Monte Carlo. The same can be said for online games. Which is why our slot guide covers both live and online slot machines.

So just to break even, an online casino needs to earn enough money so that 60% of its earnings equate to $20,000 a month. So we’re looking at a minimum casino win of at least $33,000 a month just to break even. Let’s Approach This from a Different Angle. The size of the online casino market is roughly $40 billion or $50 billion a year. Perhead is a complete turnkey pay per head white label solution for existing bookmakers and individuals looking to become a bookmaker. Perhead’s betting services provides everything you need in order to operate your own Sportsbook with In-Play Wagering, Live Dealer Casino, Horse Betting, Mobile Wagering and much more.

At BestOnlineCasinos.com you will find everything from IGT and Bally slot machines to free online games and 3D slots. Our slots guide includes reviews to some of the most popular Vegas games as well as online games. We even offer 50+ games which you can play on our site for free.

If you prefer mobile, no problem! We have you covered with our mobile slots guide. This section outlines where you can play for free as well real money. The mobile section includes a dedicated page for each device, comparison reviews and more.

Though the world of slot machines is vast, it doesn’t take long to figure out how they work and how to play them. If you have any questions, feel free to send us an email or read our FAQ slot page which answers 120+ questions about slots.

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Mobile Slot Apps

Play slot games on your mobile device. Apps for Android, iPhone, iPad and tablet devices.

Do you prefer to play slots online for free? If so, look no further. Our slots guide includes over 30 different slot games. The games features to your left are a small sampling of what we have to offer. And by free – we mean 100% free. The slot games listed on our site don’t require you to download any software and you don’t need a special account to play them. You can view all of the games here.

We also offer comparison reviews for a variety of topics. These pages include 3D games, high & low limit slots, where to find the loosest slots as well as compatibility reviews.

Did you know, most Vegas slot games are now available for mobile play? Our mobile guide provides information for Android, Blackberry, iPad, iPhone and Windows devices. This includes which casinos offer a mobile app for your device as well as where you can play mobile slot games for real money or free.

Part 1 - Slot Machine Odds, Wins & Payouts

Part 1 of our slot machine FAQ answers questions on slot odds, betting systems, payouts, winning and more.

Part 2 - Slot Clubs, Payback % & Hit Frequency

Part 2 of our guide covers some of the more technical questions like payback rates, hit frequency, probabilities.

Part 3 - Progressives, Jackpots & High Limit

Part 3 answers questions for high limit play, progressive jackpot odds, slot methods, tipping and more.

Part 4 - Video Slots, Games & Vegas Revenue

Part 4 covers slot revenue in Vegas, playing online slots, video slots, the RNG, weighted slots and more.

Slot Machine Software & Developers

Slot software has more variety than any other casino game online. Some casinos offer Vegas slots while others include 3D animation, spectacular graphics or cater strictly to bonus games. Our site offers software pages for all of the major brands including Bally, IGT, RTG, Betsoft, Microgaming and more. Below are the top five software platforms powering online casinos. Each page includes a list of the top five sites in addition to a complete overview of the various games on offer. You can view the most popular five software developers below or see our complete list here.

Slot machines are usually the most profitable part of the casino floor. More space is dedicated to slot machine gaming than any other category of casino game, from Las Vegas to tribal casinos to Monte Carlo. Though the world of slot machines is vast, it doesn’t take long to figure out how they work and how to play them.

Types of Slot Machines

There are a few different categories of slot machines, though a modern slot player only really needs to understand straight slots, video slots, progressive slots, and Buy a Pay slot machines.

Straight slots – These are traditional slot machine games. They don’t provide bonuses, and they pay out according to a standard pay table. Straight slots are the easiest slot machines to play. They’re excellent for beginners. If you’re just becoming familiar with the basics of slot gambling, stick with the straight slots. If you get bored or you want more action, consider moving on to video slots.

Video slots – “Video slots” are the fancier slot machines on the floor. These machines usually have larger screens to display movie-quality video and animation. These slots tend to be loud, flashy, and are usually placed in a conspicuous part of the casino floor to attract attention. Video slots tend to have licensed themes, like from movies or TV shows, and some of them are just loaded with bonus games and other features.

Progressive slots – “Progressive slots” are linked to other machines in the casino or even other slot machines at casinos around the country. The top jackpot for these machines is linked to other slots. A tiny percentage of every bet is added to a progressive jackpot total. Spin the right combination on your machine and the entire progressive jackpot is yours. Progressive slot machines tend to offer a worse payout percentage than machines that aren’t linked progressively, so it’s a bit of a risk to switch to a progressive machine and chase the jackpot.

Buy a Pay slots – Buy a Pay slots games have more than just one payout table that you can wager on, and you choose how many tables to bet per pull. Betting an extra payout table costs an extra wager for each one. Yes, it ends up costing more money to bet on Buy a Pay slots, but your chances of winning are better, too. Because different combinations pay out different amounts on each activated payout table, the number of potentially lucrative combinations goes up.

How Do Slot Machines Work?

Gone are the old electro-mechanical slot machines with static displays and heavy frames. These days, everything inside of a modern slot machine is controlled by a random number generator, a fancy device that spits out numbers all day. For example, when you pull the lever or push the spin button or in any way trigger the reels to start spinning, that random number generator comes up with a random number to assign to your spin, and that is how it is determined if you win or lose.

If you understand that today’s slot machines have a brain that runs on random numbers, you can avoid falling for inaccurate slot machine strategy advice. Anything you read online or hear from a friend that suggests that slot machines can be beaten is bunk. Each spin of the reels of a slot machine is unique from the one before it and has nothing to do with the one after it.

Tips for Playing Slot Machines

So now that you know slot machine outcomes are based on a random chance, do you feel like there’s no way to beat them? Don’t feel that way. Lots of people win lots of money playing the slot machines at their nearby casino or online gaming site. The trick is to keep your gaming within responsible limits and have fun.

In modern land-based casinos, slot machines are basically computers built inside cases used to advertise the game’s features, display jackpot amounts, and give gamblers all the info they need to play the game. Each machine takes up a certain amount of space on the gambling floor, and no matter how high-tech a slot is, it still requires scheduled maintenance as well as servicing throughout the day to keep the machine clean, empty or fill its physical cash storage spaces, and make sure the game functions at an optimal level to ensure continuing profit.

Slot software design companies provide online casinos the programming that powers their slot titles. In the early days of online wagering, only a small pool of casino game designers existed, thanks to the fact that gambling over the Internet was so new and so unfamiliar that few websites were offering real money slots.

Most Popular Slot Game Developers

Below is an organized list outlining the most popular developers available for both online slots and B & M slot machines. Each review covers some of the more prominent features, most popular games and casinos offering their product.

Play Free Games by the Leading Software Developers

Fast forward to 2016 – online betting is a multi-billion dollar per year industry, and the number of game designers offering suites of software for Internet casinos has swelled considerably. Below are short reviews of the most popular slot game designers in the business, a few details briefly outlining what each designer offers. Depending on what style of slot game a gambler prefers (what wager sizes are available, the presence of progressive jackpots, 3D graphics, customizable in-game options, etc.) a suite of casino software addressing those needs likely exists.

Thanks to increased competition and the changing tastes of gamblers looking for a convenient way to play their favorite games from home, the number of slot and other casino software design companies has increased exponentially since the first website to offer real money wagering launched in 1996. The fourteen design groups below represent the best-known names in the business and a huge variety of playing styles.

RTG Slot Software

Realtime Gaming (known as RTG in the industry) is one of the oldest designers still in the business, formed in 1999 soon after the first casino sites started taking real money wagers. RTG offers games in both instant-play format and a download that’s designed to be as small as possible while still providing high-quality graphics, sound effects, and plenty of features that appeal to slot machine fans. Bonus games, progressive jackpots, and a range of different game themes has made RTG one of the most popular designers for bettors looking for one-armed bandit action.

Top Game Slot Software

Top Game boasts one of the fastest downloads in the business, meaning customers at Top Game-powered sites can access the higher-quality download versions of slots and other casino games without taking up too much of their computer’s memory. Multi-currency and multi-language support makes their games available to a big chunk of the world population. Because Top Game has only been in business for six years or so, they don’t have the variety of titles found on other platforms, but their variety is growing as their list of member casinos increases.

Playtech Slot Software

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Playtech is similar to Realtime Gaming in terms of their length of time creating slot games and other gambling software. In the online casino business, the number of years a designer has been in business is directly related to the variety of games in their arsenal. Operating since the year 2000, Playtech is known for designing slots in a variety of formats that match the varied interests of machine gamblers, though they don’t release a huge number of new titles with the frequency of some of their competitors.

IGT Slot Software

International Gaming Technology, or IGT for short, is another of the big boys in slot and casino game design. IGT is an American company that designs games for land-based casinos and online betting venues. Some of the most popular online slot games are built around licensed themes, incorporating actual audio and video clips as well as characters and symbols from movies, TV shows, board games, and comic books. Slots based on pop culture icons like Wheel of Fortune, Clue, and Monopoly are a big part of IGT’s appeal to bettors hunting for Internet-based slots.

Microgaming Slot Software

Microgaming has the distinction of being the provider of the first gambling software used to accept real cash wagers over the Internet. Slots with progressive jackpots are popular to a certain set of slot machine fans, and Microgaming’s website claims that the company’s large roster of progressive slots have paid out more than $225 million in cash on their progressive games alone.

NuWorks Slot Software

NuWorks is a relatively young designer of online slots and table games, but the company has managed to carve out a niche for itself by producing beautiful and heavily-themed slots. The majority of NuWorks games incorporate video bonus rounds and their titles allow for many different wage sizes and coin denominations, meaning their games match the budget of just about every online slot machine player – including players who prefer the penny slots.

Betsoft Slot Software

Betsoft is popular with online slot players because all of their machines include wild symbols, multipliers, scatter symbols, and bonus rounds, just the sort of features that Internet slot fans are hunting for. Though Betsoft has a limited number of licensed games, they stuff enough extras into their titles to keep fans of slot-style gaming entertained for hours. Variety is a big draw for fans of the one-armed bandit, and Betsoft takes pride in their big library of feature-rich games filled with 3D animation.

WagerWorks Slot Software

Though WagerWorks has been acquired by former rival designer IGT, the company continues to produce new titles for that company’s member casinos. WagerWorks gives IGT even more branded games for their casino clients, and plenty of slot players online are drawn to these licensed titles simply because of brand recognition. WagerWorks best-known creations are slots built around classic board games, for example the Monopoly series of slots which WagerWorks updates with new features and new rules many times each year.

SPIELO G2 Slot Software

A Swedish designer formerly known as Boss Media, SPIELO G2 is a popular designer thanks in no small part to their unique themes that pay attention to details and use side games and bonus rounds designed to make slot machine play more like video gaming than traditional gambling. Offering games in a half-dozen different categories, like penny slots, multi-pay line games, and traditional-style titles means Internet casinos running SPIELO G2 offer their customers not just title variety but a ton of choices in terms of how much they want to wager. An example of SPIELO G2’s obsession with releasing games that appeal to a large audience is their World Cup-themed slot featuring a skill-based bonus round and other elements close to the hearts of soccer fans.

CTXM Slot Software

CTXM Is one of many casino game designers that also offers management and back-end services to their clients, not just slot games themselves. CTXM has offices all over the world and is at the front edge of a trend toward social media gambling and interaction between players, making online gambling a little more like traditional casino action. CTXM slots are available for play across a lot of different operating systems and platforms; slot gamblers who may not otherwise have access to their favorite way to gamble because of restrictions on compatibility with Macs, PCs, tablets, smartphones, and other gadgets can always find a CTXM-powered site that meets their hardware and software needs.

NetEnt Slot Software

Net Entertainment, known as NetEnt, has designed some of the most popular slots in the industry, including a series of titles based on the ultra-popular TV cartoon South Park. NetEnt is releasing more and more mobile platform slots along with their already-large collection of browser-based slots; for machine gamblers who don’t always want to play on their home computer can turn to NetEnt-powered gambling venues on iTV, iPhone, BlackBerry, Android devices, and (coming soon) a collection of Facebook slot titles that may one day allow real money wagering via social media.

GTS Slot Software

Gaming Technology Solutions, or GTS, is another company that goes out of its way to produce unique slot titles to capture the imagination of gamblers used to the same old themes and sets of rules they have to play over and over again. The best example of GTS slot machine’s unique style is their game Slot Box, which is a hybrid of the classic video game Tetris and traditional slot play. Instead of betting on reels and pay lines, Slot Box players have to use their hand-eye coordination and other video game skills to form winning symbol combinations. This sort of hybrid game design is not unique to GTS, but they have been building unique titles as long as they’ve been in business, and since online slot machine fans are always looking for something new in game designs, GTS is a good choice for players tired of playing the same titles and styles of games repeatedly.

Chartwell Slot Software

A recent acquisition of Chartwell by Amaya Gaming expands both groups list of game titles and gives sites running their software even more variety in all aspects of slot play. Chartwell is another design company that also does business with online casinos looking for management products and not just the software for games – but slot gamblers aren’t interested in casino management so much as they are with game design and play features. Chartwell has both needs covered, currently boasting some six dozen titles with rich and detailed graphics, themes that lead to entertaining gambling experiences with loads of replay value, and an ever-increasing roster of venues that host their titles giving players the choice of where they do their cash gambling.

bwin.party Slot Software

When bwin and Party Gaming merged in 2011, the result was a company with a massive roster of casino games (some 400+ as of this writing) and a company prepared to deal with big changes in gambling legislation worldwide. bwin.party has also just released the first Facebook slot machine games tied to real-money gambling sites, though as of the time of this review, real-cash bets on the slot games bwin.party has produced on Facebook are not available. In the next few years, bwin.party’s $50 million investment in the development of social media slot machine play could pay off big for the group, which merged in part to increase the variety in slot and other casino games as well as to deal with more customers from different parts of the world where online gambling is just starting to pick up speed.

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