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Play Free Slot Games Online

Casino slots have become a favorite for many players. Try it for free and find your best slot.


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Book of Dead

Play'n GO

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Dead or Alive 2


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Reactoonz 2

Play'n GO

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Rise of Olympus

Play'n GO

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Extra Chilli Megaways

Big Time Gaming

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Esqueleto Explosivo 2


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Mega Moolah


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Book of Ra Deluxe


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Spartacus Megaways


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Play'n GO

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The Wild Chase


Why to try free slots at CasinoPreference

The CasinoPreference team has experts in various fields. We have formed a team that analyzes and obtains as much information as possible for a specific game. This way you are informed about all the details and specifics.

Detailed description of the slot

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What you should know about casino slots

Casino slots are a fixture of the gambling business, allowing players to win large with a single spin of the wheels. Understanding how things function is vital for optimizing enjoyment and possible earnings.

slots machines images twoFirst, it is critical to understand the idea of randomness. Modern slot machines use sophisticated Random Number Generators (RNGs) to ensure that each spin’s outcome is entirely random and unaffected by previous spins. This means there is no way to forecast or influence the results, making each spin a random occurrence.

Second, acquaint yourself with the various parts of a slot machine. Reels, symbols, pay lines, and stake amounts are all important factors in influencing the outcome of a spin. Payouts vary depending on the symbols used across active pay lines, with higher-value combos earning greater awards.

Also, understand the notion of Return to Player (RTP), which reflects the proportion of bet money a slot machine will return to players over time. RTP levels normally vary between 85% and 98%, with higher numbers implying better odds for gamers.

Lastly, explore the diverse range of slot machine themes, features, and bonus rounds. Something suits every taste and preference, from classic fruit machines to immersive video slots.

By understanding these fundamental aspects of casino slots, players can approach the game with confidence, excitement, and a greater chance of success.

Types of Slots

Table of Content

Classic Slots

Also known as traditional or fruit machines, these slots typically feature three reels and simple gameplay mechanics. They often have classic symbols like fruits, bars, and lucky sevens. Many software developers produce classic slots, including Microgaming, NetEnt, and Play’n GO. Known for their simplicity, classic slots offer straightforward gameplay with limited bonus features. They usually have a single line, and winning combinations are formed by matching symbols across this line.

Some of the best classic slot machines today are:

  • Bell of Fortune
  • Monkey Madness
  • Arcade
  • Fruit Mania
  • Jackpot Cherries

Video Slots

Classic and Video slotsVideo slots are the most popular type of slot machine today. They feature advanced graphics, animations, and sound effects. Video slots can have multiple reels (usually five), numerous pay lines, and various bonus features. Leading video slot developers include NetEnt, Microgaming, Playtech, and Betsoft. Video slots have diverse features, including wild symbols, scatter symbols, bonus rounds, free spins, and interactive mini-games. They often boast elaborate themes, immersive graphics, and engaging sound effects.

  • Mega Fortune
  • Flaming Hot
  • Book of Ra Deluxe
  • Avalon II

Progressive Slots

These slots feature a jackpot that increases incrementally as players make bets. A portion of each bet contributes to the jackpot, which continues to grow until it’s won. Progressive slots can offer life-changing jackpots. Major developers like Microgaming, NetEnt, and Playtech offer progressive slot games. The key feature of progressive slots is their progressive jackpot, which grows with each bet placed by players. These jackpots can reach enormous sums and are often linked across multiple casinos, contributing to their rapid growth. Some progressive slots also include bonus rounds and other special features.

Here you can see the top progressive slots:

  • Mega Moolah
  • Mega Fortune
  • Age of the Gods
  • Jackpot Giant
  • Major Millions

3D Slots

Similar to video slots, 3D slots feature high-quality three-dimensional graphics and animations. They provide an immersive gaming experience with engaging visuals and interactive elements. Betsoft Gaming is a prominent developer known for its innovative 3D slot games. Others, such as NetEnt and Microgaming, also offer 3D slots. 3D slots are renowned for their stunning three-dimensional graphics and animations, which create an immersive gaming experience. They often feature intricate storylines, cinematic intros, and interactive bonus rounds, adding depth to the gameplay.

Most played 3D Slots are:

  • Vikings Go to Hell
  • Flaming Fox
  • EggOMatic
  • Finn and the Swirly Spin

Branded Slots

Branded slots are themed around popular franchises like movies, TV shows, video games, or celebrities. These slots often feature recognizable characters, symbols, and soundtracks from the franchise. Many developers collaborate with popular franchises to create branded slots. Examples include Playtech’s Marvel-themed slots, NetEnt’s rock band slots like Guns N’ Roses and Jimi Hendrix, and Microgaming’s Game of Thrones slot. Branded slots feature recognizable characters, symbols, and soundtracks from the franchise they’re based on. They often include themed bonus rounds, special animations, and audio clips from the source material, enhancing the overall immersion for fans.

Here are 5 best-branded slots:

  • Squid Game – One Lucky Day
  • Detroit Red Wings Winged Reelers
  • Maradona El Pibe Oro
  • The Goonies Hey You Guys
  • Motley Crue

Multi-Payline Slots

Unlike classic slots, which typically have a single payline, multi-payline slots allow players to bet on multiple paylines simultaneously. This increases the chances of winning but also requires larger bets. Many developers, including NetEnt, Microgaming, and Play’n GO offer multi-payline slots. Multi-payline slots allow players to bet on multiple paylines simultaneously, increasing the chances of winning on each spin. They often feature adjustable pay lines, allowing players to choose how many lines to bet on and additional features like stacked wilds and expanding symbols.

Here are the top multi-pay line slots:

  • Secret Code
  • Zeus 1000
  • Dragon Kingdom
  • Ice Hockey

Mobile Slots

With the rise of mobile gaming, many slots are optimized for play on smartphones and tablets. These mobile slots offer the same features and gameplay as their desktop counterparts but are designed for touchscreen devices. Most major slot developers optimize their games for mobile play. Some examples include NetEnt Touch, Microgaming’s mobile platform, and Play’n GO’s mobile-friendly slots. Mobile slots are designed to be played on smartphones and tablets, offering intuitive touch controls and optimized interfaces. They retain all the features of desktop slots, including bonus rounds, free spins, and interactive elements, allowing players to enjoy their favorite games on the go.

The most preferred mobile slots are:

  • Starburst
  • Rainbow Riches
  • Book of Ra Deluxe
  • Guns’n’ Roses
  • Dead or Alive 2

MegaWays Slots

slots machines images twoMegaWays slots feature a dynamic reel structure with changing numbers of symbols per reel on each spin, leading to thousands or even hundreds of thousands of ways to win. Big Time Gaming pioneered the MegaWays mechanic and licensed it to other developers. The standout feature of MegaWays slots is the dynamic reel structure, which can result in thousands or hundreds of thousands of ways to win on each spin. These slots often feature cascading reels, where winning symbols disappear and are replaced by new ones, creating opportunities for consecutive wins. They also typically include free spins bonuses with increasing multipliers, providing the potential for massive payouts.

The best Megaways slots are:

  • Bonanza Megaways
  • Skol Branded Megaways
  • Gonzo’s Quest Megaways
  • Age of the Gods: King of Olympus Megaways
  • Wheel of Fortune Megaways

Slots Features

Slot machines offer a plethora of exciting features designed to enhance gameplay and increase winning opportunities. From wild symbols that substitute for other symbols to create winning combinations to scatter symbols that trigger bonus rounds and free spins, each feature adds layers of excitement and potential rewards. Multipliers amplify winnings, while bonus rounds provide interactive experiences with additional chances to win big. Some slots incorporate cascading reels, where winning combinations disappear to make way for new symbols, potentially leading to consecutive wins within a single spin. Gamble features allow players to risk their winnings for a chance to double or quadruple them, adding a thrilling gambling element. With progressive jackpots continually growing with each bet placed, players can win life-changing sums. These diverse features ensure every spin is packed with anticipation and excitement, making slots a favorite among casino enthusiasts worldwide.

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Wild symbols substitute for other symbols (except for special symbols like scatters) to help form winning combinations. They can significantly increase the likelihood of creating winning lines on the reels. There are various types of wild symbols, including standard wilds, expanding wilds that cover entire reels, sticky wilds that remain in place for multiple spins, and stacked wilds that appear in stacks on the reels. Wild symbols allow players to complete winning combinations more easily, potentially leading to bigger payouts. Strategic placement of wilds can maximize winning potential, especially in conjunction with other features like multipliers.

Examples of Games with Wild Features:

  • Gonzo’s Quest
  • Starburst
  • Mega Moolah
  • Immortal Romance
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Scatter symbols are special symbols that can appear anywhere on the reels to trigger various bonus features or payouts, regardless of their position on the pay lines. When a certain number of scatters appear on the reels in a single spin, they often trigger bonus rounds, free spins, or other special features. Some slots offer scatter pays, where landing a certain number of symbols awards a payout, while others feature scatter symbols that trigger bonus features.

Notable Scatter Symbol Games:

  • Book of Dead
  • Cleopatra
  • Thunderstruck II
  • Dead or Alive
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Multiplier symbols increase the payout of winning combinations by a specified multiplier value. For example, a 2x multiplier doubles the payout, while a 3x multiplier triples it. Multipliers can be applied to individual symbols, entire wins, or even during bonus rounds and free spins, amplifying the potential winnings. Multipliers can significantly boost payouts, especially with features like wilds or free spins. They add excitement and anticipation to gameplay by offering the chance for larger wins.

Popular Slots with Multiplier Features:

  • Mega Fortune
  • Bonanza
  • Raging Rhino
  • Dead or Alive 2
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Free Spins

Free spins are bonus rounds in slot games where players are awarded a set number of spins without having to wager additional funds. They are often triggered by landing a specific combination of scatter symbols on the reels. Scatter symbols are commonly used to trigger free spin rounds. The more scatters you land, the more free spins you typically receive. Free spin rounds often come with additional features such as multipliers, stacked wilds, expanding symbols, or special bonus symbols, enhancing the potential for big wins.

Notable Games with Exciting Free Spin Features:

  • Mega Moolah
  • Gonzo’s Quest
  • Cleopatra
  • Vikings Go Berzerk

History of slots

Invention and Innovation

Slot machines quickly gained recognition in gaming centers and casinos worldwide for their player-controlled pace and reliance on luck over skill. Interestingly, the term “slot machine” initially referred to both vending and gambling machines due to their identical coin slots. The first mechanical slot machine, the “Liberty Bell,” was invented by Charles Fey in 1895, featuring three reels and symbols like horseshoes and bells. Fey’s innovative designs created various early slot machines, including the “Card Bell” and the “4-11-44.”

slots machines imageElectrifying Transformation

The 20th century witnessed a surge of innovation in slot machine technology. In the 1960s, electric-powered machines replaced their mechanical counterparts, introducing features like flashing lights, sound effects, and automatic payouts. The introduction of video slots in the 1970s marked another milestone, incorporating digital displays and interactive bonus rounds. These advancements not only enhanced gameplay but also expanded the appeal of slots to a broader audience.

Digital Revolution and Beyond

The advent of the internet and digital technology revolutionized the slot machine industry once again. Online casinos emerged in the mid-1990s, offering players unprecedented convenience and access to a vast array of games. Today, players can enjoy a diverse selection of themed slots with stunning graphics, immersive soundtracks, and innovative features. Mobile gaming has further transformed the landscape, allowing enthusiasts to play their favorite slots anytime, anywhere.


The history of slots is a testament to human ingenuity and the enduring appeal of games of chance. From Charles Fey’s mechanical marvels to the digital extravaganzas of today, slots have evolved and adapted to meet the ever-changing tastes and technologies of players worldwide. Fey’s legacy paved the way for modern slot machines, which continue to captivate players in both land-based and online casinos today.

Top 5 Most Popular Slots of All Time

Some slot games always stay young, regardless of their release dates. The following top titles are available in old and new slot sites:


Book of Dead

Book of Dead, released in 2016, is a popular game on all leading slot sites. It stars Riche Wilde as the main character. In this adventure-themed slot, you’ll accompany him over the dunes of Egypt. Rich Wilde and the Book of Dead is a slot machine with a traditional design suitable for beginners and experts. If you land the scatter symbol, you’ll get 10 free spins. A golden book symbolizes the dispersal. Surprisingly, the scatter is also a wild sign. As the wild symbol, it will substitute for other symbols to create winning combos. Other characteristics of this game include a gamble round and Riche Wilde symbols. These features can dramatically increase your earnings.

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Mega Moolah

Mega Moolah is an iconic progressive jackpot slot game developed by Microgaming, one of the leading software providers in the iGaming industry. Launched in 2006, Mega Moolah has gained widespread acclaim for its massive jackpots, engaging gameplay, and charming African safari theme. The slot features a safari theme and offers four progressive jackpots, including the life-changing Mega Jackpot. Mega Moolah holds the Guinness World Record for the largest online slot jackpot payout, cementing its status as one of the most popular slots ever.

Symbol Legacy of Egypt Cleopatra


Cleopatra is a classic slot game that IGT (International Game Technology) developed. It is known for its captivating Egyptian theme, simple gameplay mechanics, and rewarding bonus features. Released in land-based casinos in the early 2000s and later adapted for online play, Cleopatra has remained a popular choice among slot enthusiasts worldwide. It is known for its simple yet rewarding gameplay, featuring free spins with tripled payouts and medium volatility. Cleopatra’s popularity transcends generations, remaining a favorite among players since its release.



NetEnt’s Starburst slot is visually spectacular, with brilliant hues and glittering diamonds. It is known for its basic yet engaging gameplay, which includes growing wilds, respins, and extreme volatility. Starburst’s success stems from its ubiquitous availability in online casinos


Book of Ra

Book of Ra is a renowned slot game created by Novomatic, a major developer of casino games worldwide. Released in 2005, it immediately became a fan favorite and cult classic. The game is well-known for its fascinating gaming features, which include a free spins feature with expanding symbols and significant volatility. Book of Ra has become a cult favorite among slot fans, generating multiple sequels and spinoffs.

Pros and Cons of Playing Slots at Online Casinos



  • No special skills
  • Mobile-friendly games
  • Various themes
  • Free slots on most websites
  • Mostly based on luck
  • High risk of gambling addiction

10 interesting facts about slots

Frequently Asked Questions

What is the RTP of a slot machine?

RTP stands for “Return to Player” and represents the percentage of all wagered money that a slot machine will pay back to players over time. For example, if a slot machine has an RTP of 95%, it means that, on average, players can expect to receive $95 for every $100 wagered.

What are pay lines, and how do they work?

Paylines are the lines on which winning combinations of symbols must appear for a player to win a payout. Traditional slot machines feature a single pay line running across the center of the reels, but modern slots can have multiple pay lines, ranging from a few to hundreds.

What are the bonus features of slot machines?

Bonus features are special gameplay elements that enhance slot machines’ excitement and potential winnings. Common bonus features include free spins, multipliers, wild symbols, scatter symbols, and bonus rounds.

What is the highest amount I can win on slots?

The highest amount you can win on slots varies from game to game and depends on certain factors, such as whether the slot has a jackpot mechanic. You can win millions of dollars when playing online slots with progressive jackpots.

Which are the best slots?

Some popular choices include Starburst, Book of Ra, Mega Moolah, Cleopatra, and Buffalo, each offering unique themes, features, and potential for big wins.