Common Slots Themes

Online slots have become one of the most popular online casino games of all times. Today, it’s a wildly popular game played in various platforms and there’s a thousand of online slot games available in mobile platform, such as Android and iOS.


What makes online slots so exciting is the themes designed and integrated by game developers. There’s just a thousand themes that exist today in different online slot games. You will come across online slot themes based on popular movies or TV series. There are some that are based on cartoons and jungle animals.

What makes themes popular among online slot players is also the features that come with it as well as the interesting bonuses integrated as part of the games. It makes the game more engaging and interactive.

While there are thousands of different online slots themes that exist today, the most common are the following:

Movie Themes

There are plenty of movie-themed online slots in the online gambling market today. Some of these are even official themes in partner with the movie producer or distributor. There are free movie themes and there are also paid movie themes. Movie themes have become one of the favorite options for online slot players.

In movie themed online slot games, the characters in the movie are important elements of the game and some of them are even used as special symbols, bonus features, etc. Example of movies used as themes are Iron Man, X-Men, the Godfather, Lord of the Rings trilogy, Tomb Raider, The Hangover, King Kong, Fantastic Four and The Dark Knight.

The Price is Right

TV Show Themes

Popular TV shows are also commonly used as themes in online slot games. This is because of its popularity and most players can relate. They find it exciting to play through TV show characters they like and relate. There’s a wide variety of TV show themes that ranges from adventure to game shows to drama series.

The game is also designed for you to play as if you are part of the TV show. Most common examples of TV shows used as themes are The Price is Right, Jeopardy, Wheel of Fortune, Family Guy, Sex and the City, and X-Factor.

Game Shows

Like TV shows, there are also online slot games that use game shows as themes. These game shows remind you of popular 50s game shows, such as Jeopardy, The Price is Right and Wheel of Fortune. These game shows based themes are excitingly cool and will make you feel like you are part of that old 50s game show.

History Themes

Other online slot games will take you to parts in time and historical world eras. These history themed online games provide for an exciting and adventurous game experience as you navigate your way through Ancient Egypt and Ancient Rome.

There are very thrilling gameplays and exciting prizes hidden in every historical artifacts used as symbols for you to win prizes. Other history themes include the Balkan Wars, Korean War, World Wars, etc. If you are into tanks, artilleries and generals then you are in for a treat.


With the advance in technology and the popularity of 3D in movies, mobile games and game consoles, 3D themed online slots have become increasingly popular as well. These games are built to provide you an amazing and exception gaming experience with a super-cool environment. It provides a lot of innovations and offer intricate graphics in crisp and clear detail.

DC Comic Slots

The company behind your DC superheroes have also partnered with online casino developers to create a wide variety of DC Comic online slot themes. These add to more exhilarating and adrenaline-charged experience with themes such as Superman, Wonder Woman, Batman, Nightwing and Green Lantern. These are all top quality online slots with exceedingly impressive animation and graphics that come with progressive jackpots. Not to mention, you get to play your favorite superheroes or even feel like them while you are winning in cash and having the fun of your life!

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Why are other online slot game themes and why are they important?

Other common online slots themes are Food, Sports, Fantasy, Wild West, Sci-fi, Ocean, Action-Adventure, Celebrity, Animal and even holidays. These themes add more thrill, cool graphics, favorite characters and overall fancy experience.

There are titles from Microgaming that are easily worldwide favorite because of the beloved themes that have found their way into players’ hearts. These are:

  • Thunderstruck II – it’s a popular online slot with a 5 reel, 9 line playline full of exciting free spins feature and exciting twists. The theme is embellished with Norse mythology characters that will take you to an amazing thunder adventure experience.
  • Mega Moolah – is very much known for its high prize progressive jackpot and very familiar theme. It is a 5 reel, 25 playline full of cute safari characters that has made the game one of the most beloved online slots of all time.
  • Tomb Raider – this online slot theme came out in 2004 and was quickly a favorite among many players. Today, it’s still one of the most popular titles being played by enthusiasts around in the online casino world.

If you are a real online slot player, online slot themes make it more intimate and will always play a role in your gaming experience or choice of online slot game.

It’s fair to say that these online slot themes add to the dynamics of the games and how the online slots become more interactive with the players. To add to that, the themes provide exciting prizes and uses characters as an integral element of the games that gives a different kind of feel and impact to players.

There’s really no two games with the same theme so you will have a chance to find the game that you think is best for you. It’s best to explore and look around before you settle on the best theme you find it best – you never know that the perfect theme and the perfect online slot game out there is just waiting for you.


Top 3 Best Slots Game Developers: Microgaming vs. NetEnt vs. Playtech

Online slot games are a dozen a dime in the internet today. There are just a thousand of internet online slot games out there. There are a lot of developers and operators that countlessly create them every year and in different platforms – web-based, Android-based app, iOS, etc.

As a player, you’ll be wondering, with all the slot games that you notice popping up here and there, how would you know who among the developers behind them are the best? The best in terms of providing exciting, high quality, high-jackpot and fun gaming experience. The past two decades has established the online casino boom as it became a huge part of the overall gaming industry. It has produced three of the biggest names in the industry who are known to provide vibrant and exciting gaming experience: Microgaming, NetEnt and Playtech. These developers are responsible for the most loved online slots in the world.



Microgaming is considered as the king of the online slots in the world. Most often than you realize, the online slots that you’ve been playing have been produced by Microgaming. It’s responsible for a few of the most popular online slots you can find online and they have a huge collection of different slot games to choose from. That would include Mega Moolah, 5 Reel Drive and Bar Bar Black Sheep, to name a few.

Mega Moolah

By far the best online slot game ever developed in the world today is Mega Moolah. It’s been designed to be played by either a beginner or seasoned player. Thanks to its ultra-user-friendly gaming experience platform. Anyone can easily understand how to navigate the game and enjoy!

Mega Moolah is a five reel slot game with 25 playlines. It is embellished with enormous scope of winning prizes. You can play a maximum of 5p bet and a minimum bet of 1p. That said, with a 5p bet, you can get a maximum wager of 125 coins per spin. Some of the cool features of Mega Moolah are the following:

  • Jungle environment experience – symbols used include lions, zebras, elephants, monkeys and giraffes
  • Other high-value symbols include ace, king, queen, jack, etc.
  • 12% RTP
  • Offers in-game multiplier
  • Offers free Spins and bonuses – the scatter symbol, which is a monkey, plays a crucial role where if you manage to get the three scatter symbol, you win free spins. On top of that, whenever you get a scatter symbol in your free spin, you get triple credits.
  • The lion is the Golden Wild Symbol, which offers wider benefits and returns that any of the other symbols. You get to win more cash instantly in a short period of time the more you spin the wheel and the more you get wild symbols as you can.
  • Easy payment options

5 Reel Drive

5 Reel Drive has had numerous changes over the past two decades: it was one of the Microgaming 5 reel spaces that was discharged in 1999 and its portable variant was pulled out in September 2013. It is still one of the strong and most-played Microgaming slot games with a 1950s theme. It uses HTML5 and its opening is similar across different platforms – iPhone, Android, PC, etc. The game has 9 playlines with exciting features, such as:

  • 50’s theme with splendid images and decorated headers
  • Includes two dynamic huge stakes – the Wonder Jackpot and Mega Wonder Jackpot
  • Offers in-game multipliers
  • Offers free spins and bonuses from scatters – the more scatters (at least 3) translate to up to 30 free spins

Bar Bar Black Sheep

One of the most popular slot game for a time – Bar Bar Black Sheep is your nursery rhyme themed online slot. It even includes Jack and Jill! No wonder it has carved its place in the heart of online slot players around the world.

It’s a fun and hilarious online slot game with very exciting features, such as:

  • 15 fixed playlines in a 5×3 slot
  • Game symbols include cartoon graphics that showcase black sheep, farmhouse, cow and fruits
  • Offers in-game multipliers
  • Free spins and bonuses from scatter symbols
  • You can bet $0.15 per spin and up to a maximum of $150 per spin

Microgaming has been around for more than 20 years in the industry. The company was founded in 1994 and is the de facto first online casino in the world. Microgaming is based in the Isle of Man and it is the biggest supplier of online games in the world – they have created 850 casino games in 1,200 different variants. It is also the recipient of at different accolades from at least 7 award-giving bodies.



One of the most innovative and hugest developer of online slot games in the world is NetEnt. It is known to push boundaries and produce games with really cutting-edge graphics and exciting features. It was founded in 1996 in Sweden and has been in the industry for more than 20 years. It entered the US Market in 2015.

NetEnt is home to hundreds of fantastic online slots – if you came across those fancy and really awesome rock-themed slot games then you will be assured that NetEnt is behind them. That said, the company has gained fame from their NetEnt Rocks series where popular games include Guns N’ Roses, Motorhead and Jimi Hendrix. Other popular games under NetEnt’s belt are Starburst and Gonzo’s Quest.

Guns N’ Roses

As soon as you open the game you’ll be in for a great surprise with classics such as Sweet Child of Mine and Welcome to the Jungle playing in the background. This sets the mood of the whole gaming experience. You can even choose from any of the 5 hits of the band that’s available in the game.

Important features and details of the game are as follows:

  • 20-line, 5-reel and 3-row slots
  • Awesome scatter symbols that represent Slash, Axl Rose, Appetite for Destruction and Legend Spins
  • Offers a lot of exciting features and encore free spins
  • Legend Spins can give you 1 to 2 stacked wild reels as well as 3 free spins once activated
  • Solo multiplier feature can happen at random and will multiply playlines with payouts of up 10x
  • Other symbols such as J, K, Q, 10 give excellent payout of up 125x

Gonzo’s Quest

It is designed for adventure lovers and of the latest offerings of NetEnt. The whole game is inspired by the famous Spanish conquistador, Gonzalo Pizarro, and his adventures. His mission to the City of El Dorado is showcased across the game.

Top features of the game include:

  • 96% RTP
  • Extremely intricate block carvings that reminds you of cool Aztec ruins from ancient South America
  • Wild symbol (a question mark) can let you secure free spins and most importantly, let you easily replace to another symbol in order to create a winning piece
  • Free fall symbols, if you hit 3, can give you Avalanche multipliers with a range of 3x – 15x


One of the most colorful and thrilling slot games around is Starburst. It’s become one of the classic casino classics. This NetEnt game is very fast-paced and offers a heart-popping thrilling experience all throughout the game. Its electrifying features include:

  • 10 playlines, 5 reels
  • Symbols are composed of awesomely colorful jewels
  • Offered in both mobile and PC
  • Re-spins
  • Mobile
  • Auto play
  • Win both ways
  • 1% RTP

NetEnt is also know to partner with huge brands in the world. They offer slot games that feature popular TV series and films. To name a couple are Scarface and South Park. Plus, they develop and release new slots regularly so there’s always an exciting thing to look forward all the time.



One of the 3 big names in the online slot games industry is Playtech. It’s been recognized by players around the world as having one of the most high-quality games with some of the really huge prizes available today.

Here are some of the top Playtech online slot games around –

Alchemists Lab

Based on the classic history of men pursuing the knowledge the find the key to immortality and the study of transmuting ordinary pieces of metals into gold. This legendary tradition of research and experimentation is the philosophy behind alchemy. Thanks to Alchemist’s Lab, this tradition is being given a second chance of attention.

The game is interestingly very colorful, all paying tribute to alchemists throughout the world who pursued gold and immortality. Some of the games finest features include the following:

  • Extremely friendly gameplay
  • Scatter symbols activates plenty of bonus features throughout the game
  • Bonus features allow you to relive the life of alchemists of olden times – you get to chance to pick bottles that lets you create gold and win prizes
  • 32% RTP

Lucky Panda

Lucky Panda provides an ample amount of fun and action in the game. The game has an authentic oriental theme that’s not only charming but also refreshing and colorful. Its gameplay is also simple and user-friendly.

Highlights of the game include a 5-reel playline with a thousand ways to win cash prizes. You can earn cash by getting all four rows filled with symbols compared to the three rows usually required by traditional slot games. With this type of design, you will need to bit higher.

Lucky Panda uses adorable pandas, snakes, small bears, monkeys, tigers and birds as symbols. The adorable panda is a scatter symbol, which offer you to win 15 free games. Lucky Panda also offers second chance scatter if you get two scatters.

Football Rules

Football Rules is a football lover’s haven in the world of online lot games. It will definitely serve you in the most entertaining way possible! It currently holds a 97.6% RTP and provides in-game multipliers that can earn you up to 20 spins and maximum 10x multiplier. Other features include:

  • Fun, simple and easy gameplay
  • Cool symbols include Bobby Moore, the World Cup and the Stadium
  • You can get around 20x free spin activated through landing Bobby Moore symbols

Playtech is based in the Isle of Man but was founded in Estonia in 1999. The company was a slow starter in the online casino industry when it only released their first software in 2001. Though a late starter in the industry, it had a meteoric rise thanks to its association to several of the biggest casinos in the world. Not to mention its association to Warner Bros, who taps on Playtech to create official slots based on Warner Bros films.

Yggdrasil Gaming.jpgBe on the look-out for Yggdrasil Gaming

This game developer started in 2013 but is slowly making a big name in the online slots industry today. It is one of the leader provider of premium slots games and is challenging the market with its aggressively innovations and improved gaming platform. Some of the really awesome slots to look-out from them are:

  • Beauty and the Beast – one of the company’s most innovative games taking on the theme of the classic children’s fairy tale
  • Jungle Books – was recently announced in September 2017 and features themes taken from the Rudyard Kipling book and introduces Fusion Realms mechanic, a new way for your to seamlessly mix different reel features and structures in a single game

Super Heroes – an epic game that features cutting edge graphics and stunning animations all full-packed with lots of bonuses across its 3-row, 5-reel and 20 playline gameplay

Slots RTP and Variance Explained

There’s a lot of dynamics around online slot games that make it so exciting. Knowing these dynamics and understanding how they work are essentials if you these games. They are key to making a calculated bet and enjoying the game at the same time. Today, we’re going to talk about two important dynamics in online slots – Return to Player ratio and Variance.

Slots RTP

Return to Player Ratio

You might be wondering what you should look for in a slot game before you place your bet on it. Among your favorite slots, what do you think should matter most? Is it the themes or the graphics or the animation? What about the jackpot prizes and bonuses?

Too difficult, right? It all becomes a complex thought process with too many variables and factors involved.

Beyond all of them, the most important factor to consider is the RTP or what’s commonly called the Return to Player percentage. The RTP determines the payout percentage of every online slot game. This is usually shown in percentage and the higher the percentage means the higher chances of winning on a long term perspective – you will have less likelihood to lose.

How does RTP work and how is it calculated?

RTP percentages are usually published on every online slot games. Sometimes, it is listed in the information section of the online slot game you play. It can also be easily searched online if you want to take a careful look of the game.

Return to Player rations is calculated as follows:

RTP = total amount returned to players / total amount bet by players

What this means is that if the published RTP ratio is 96% (an industry average), that means that over a long period of time, you will likely win 96% of your 100% stake. Why do I emphasize long term? That’s because RTP is not calculated and reflective of short term betting. Which means, that if you bet 100% one time, you will likely get 96% return. If that’s going to be the case, that would be boring, wouldn’t it? And you wouldn’t want to bet your money on something you can only get less than what you spent all the time.

Since RTP ratios work on long term average, it is calculated over thousands, if not million, of spins and it’s influenced by the volatility and variance of the online slot. You will need to play a lot of spins in order for you to win close to the RTP ratio.

Nevertheless, this shouldn’t discourage you from playing your favorite online slot. You will just need to understand how it works. And one of the factors that play a role in short term betting is its variations – it can go as wild as it can be. That’s because the online slot game is designed and dictated by a random number generator.

That said, in short term betting, you can win big time right away or lose excessively in a one or two spins – all of these are dictated by the program behind the slot.

You will also come across online slots with different RTP ratios; some might be as high as 99% while some as low as 90% or even 85%. Industry average until today remains to be at 96%. There’s no online slot that gives 100% RTP percentage because that would just defeat the existence of the casino and would fold them into bankruptcy.

However, the 96% industry average in online slots are already considered higher compared to land-based casinos, which only have an average 85% or even lower. There’s plenty things involved in the arena but mostly it’s because of the competitive environment of the online marketplace. This is also one of the selling point of game developers to entice players to play their games.

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Online slots with high RTPs

There are a lot of online slots that are known to have high Return to Player ratios. These include the following:

  • Monopoly Big Event
  • Zombies
  • The Catfhather
  • Kings of Chicago
  • Gemix
  • Blood Suckers
  • Jackpot 6000
  • Jack Hammer

These online slots are known to have an average 99% RTP and have known to entice a lot of players with its favorable offering. There are also a thousand online slots that publishes or known to have more than 96% RTP ratios. You will just need to check the information section or perform your due diligence before placing your bet on the game.

Ultimately, the online slot game landscape is a fun, exciting and thrilling environment. But it’s not a perfect world, even if it offers 99% Return to Player ratio. There will always be variances and your experience will differ – you might do well and get lucky in your first few spins or you might lose every once in a while.

You will just need to keep in mind that the higher RTP means that you will have better chances of winning in the long run. It’s an important factor to consider especially if you’re trying to build loyalty or you’re starting to establish which will be your favorite game.

Slots Variance

Volatility and variance are some of the things you will have already came across. While these commonly describes online slots, they’re a bit difficult to understand. These two words actually mean the same and there’s some science behind them.

Unless your brain is pretty much wired the same way, understanding variance is a bit complex. Variance describes how far the chance will be away from the mean (a type of average). This means that the higher the variance or volatility is, the more chances you will have for big swings.

Understanding variance in simple terms

Say in a game of die, where you will win $11 if you get six and you will lose $1 if you get one to five. If you roll the die six times, you will lose an average $1 for each of the one to five – average of $1 for one, average of $1 for two, average of $1 for three, average of $1 for four, and so on and so forth. At the same time, you will also win an average $11 win for the six. If you calculate all of that, you will get a total winning of $6 for all six rolls, which translates to an average win of $1 in every roll.

Now, let’s say you’re flipping a coin where you will win $3 for tails and you will lose $1 for heads. If you flip the coin four times, you will win an average of $3 on heads and losing $1 on tails. This means that you will win an average $1 for every flip of the coin or win a total of $2 every time you flip twice.

With both games, you’ll notice that you will win $1 on average. However, there’s a much likelihood for you to lose some games successively when you play the die than when you play the coin flip. Your advantage remains the same but the variance changes significantly – the coin flip has a lower variance while the die game has a higher variance.

How does variance affect your game?

The higher the level of variance in a game, the higher will be your chances of having a losing streak. However, this increases the value of your wins in those times where you are on top. This definitely affects your game and will make you think about pulling out or continuing.

If you play it smartly, you’ll realize that it will take a string of losing spins before you it hit big. That’s why you will need to compensate by betting smaller amounts and spread it across until you make a huge win. If you look at it closely, you will be betting the same amount if you bet on high variance games and on low variance games. It’s just that you will do it differently on high variance games but your bets will likely be small in amount.

Determining volatility of online slot machines

Finding out the volatility of an online slot game is by checking out how balanced the pay table is as well as the bonus features. If there’s a lot of value concentrated in the bonus features or the top prizes, especially on fairly rare features, then there’s likelihood that the online slot is a high-variance slot. A common example are progressive jackpot games.

If the top payouts are low on the other hand, and if there are a lot of small and medium prizes scattered with a high hit rate, then there’s likelihood that the online slot game is a low variance slot.

Examples of variance

The Incinerator online slot developed by Yggdrasil is one example of a low variance slot game. Its’ top payout is just 200x on a single win and it’s designed for you to get several wins on a single spin. In addition, the hit rate for Incinerator is also extremely high and is not tied up to any bonus feature.

One example of a high variance online slot is Mega Moolah developed by Microgaming. It is one of the games with very high progressive jackpots and still holds the record in the online gaming industry with the highest jackpot, which is a minimum of $1 Million.