100% Independent from Casino Operators

More than 550 Free Play Games

Unbiased Reviews of the UK‘s Top Slot Casinos

Williams Interactive (SG Interactive)

Williams Interactive (SG Interactive)

When you consider that online slots are video games at their core, it only makes sense that an illustrious arcade titan would also make online slots. WMS, formerly known as the Williams Manufacturing Company, got its start making pinball machines in the 1940s. After dominating video games in the 1970s and 1980s, the company entered the slots market in the 1990s.

In 2012, Williams Interactive was created as a subsidiary of WMS Industries that would focus exclusively on the online gambling, casual, social and mobile gaming sectors. As of 2013, the buyout of WMS (and, therefore, Williams Interactive) by Scientific Games began and that merger was completed in 2018. The whole situation is a little confusing, and that's why it's not unusual to see WMS, SG and Williams Interactive used pretty much interchangeably online.

Our slot machine experts have compared and reviewed every licensed online casino in the UK. We've found the best games and online slots from Williams Interactive at the most trusted sites. Here's what you can expect when you visit a recommended WMS slots casino online:

  • The best selection of action-packed slot machines
  • Friendly customer service available around the clock
  • A big sign up bonus and amazing rewards

Try Your Luck with the Top Slots

Rainbow Riches

Online casinos powered by Williams Interactive will often times present Rainbow Riches as one of the top slots. This is because the colorful theme combined with the good luck charms make it very exciting. The image in the background will show a colorful rainbow and the five reels are in charge of generating the riches. Wins can occur on up to 20 lines for combinations that start from the first reel on the left and continue to the right. There are three bonus games to be found inside, each triggered by three of the special symbols.

  • Reels: 5
  • Paylines: 1-20
  • Special Symbols: Wild (Gold Coin), Bonus (Road to Riches), Bonus (Wishing Well), Bonus (Pots of Gold)
  • Features: Substitute, Bonus Games

Epic Monopoly II

While there are several slots themed after Monopoly, this one is arguably the best from Williams Interactive. The attention to detail is very impressive and the playing screen will show right from the start that this is not like most other online slots. While the game has the standard screen of five reels and four rows on the left, it is joined by an even bigger screen of five reels and 12 rows, known as the Colossal Reel set. These two work independently of each other and some of the main symbols appear stacked to better provide opportunities to win. Plus, there are three bonus games and wilds in-play.

  • Reels: 5 + 5
  • Paylines: 100
  • Special Symbols: Wild (Epic Wild), Bonus (Monopoly Board)
  • Features: Substitute, Bonus games

Monopoly Once Around Deluxe

Keeping with the Monopoly theme, Williams Interactive launched Once Around Deluxe as an improved version of its previous slot. The graphics have been given a makeover and the betting panel now has a shiny nice finish. For the game, the classic Monopoly symbols have been maintained so fans of the board game will really enjoy spinning the five reels to see where they land.

Even the bonus features keep with the theme and will allow players to build houses or hotels to get more income on their properties while rolling the dice to advance around the board.

  • Reels: 5
  • Paylines: 15
  • Special Symbols: Wild (Monopoly Man), Bonus (Dice), Scatter (Chest), Scatter (Chance)
  • Features: Substitute, Bonus Games

Michael Jackson King of Pop

Michael Jackson: King of Pop was created as a combined effort between SG Interactive and Bally to be a tribute to the gloved wonder. The online slot actually incorporates some of the biggest hits from Michael Jackson in its soundtrack and the visual effects were inspired from his music videos. In addition to the wild symbols, there is also a bonus game with a spinning wheel to award prizes and two types of free games. It is easily one of the biggest games to check out at casinos using Williams Interactive software, especially for fans of the King of Pop.

  • Reels: 5
  • Paylines: 25
  • Special Symbols: Wild (Wild), Scatter (Jackpot), Bonus (Michael Jackson)
  • Features: Substitute, Free Spins, Bonus Game

Wishing You Fortune

Williams Interactive is not just about classic slots and it can really go above and beyond when it comes to the graphics. The best example of this is the Wishing You Fortune online slot. This beautiful creation incorporates some Chinese elements with bright colours and a calming theme.

Wins will take place very often since the slot has 1,024 ways to win always active that cover any possible combination from left to right on the 5x4 screen. There is also a bonus symbol that will trigger the free spins with additional wild symbols that can also multiply the win they help create. Five jackpots can be won from the Festival Wheel Bonus game.

  • Reels: 5
  • Paylines: 1,024
  • Special Symbols: Wild (Gold Lion), Bonus (Princess), Bonus (Logo)
  • Features: Substitute, Free Spins, Bonus Game, Jackpots

88 Fortunes

Continuing with the Asian theme, 88 Fortunes powered by SG Interactive comes with a very colourful design and some unique features. In addition to the golden symbols on the reels that generate wins, players can also unlock four jackpots by placing an extra bet. This can be done from the panel on the left and going for 5 gold symbols will make the Grand jackpot available. Winning a jackpot has a random chance when one or more FU BAT wild symbols appear. Furthermore, the card symbols are eliminated from the game during the free spins, triggered by three or more Gong symbols.

  • Reels: 5
  • Paylines: 243
  • Special Symbols: Wild (FU BAT), Scatter (Gong)
  • Features: Substitute, Free Spins, Jackpots


Spartacus is another top online slot powered by Williams Interactive. It has an action-packed theme with gladiators and various weapons on the reels. Some of the symbols appear stacked and take up multiple positions to go better with the double set of rollers. Yes, Spartacus doesn’t just have one screen of five reels but two, which will spin at the same time for more potential to win on the 100 total lines. Even the wild symbols appear stacked sometimes and this can really make for nice wins. Another nice function is that the free spins require three or more scatters in total across both screens.

  • Reels: 5 + 5
  • Paylines: 100
  • Special Symbols: Wild (Logo), Scatter (Coliseum)
  • Features: Substitute, Free Spins

Raging Rhino

Fans of WMS casinos will certainly be familiar with Raging Rhino as this is one of the best known slots in the collection. Its multiple claims to fame include a theme based in the African jungle, a matching soundtrack of animals making noises and classic features. What does make Raging Rhino a bit different is the fact that it has six reels rather than the standard five. With four rows of symbols on each roller, the game covers all ways to win from left to right. The screen will expand to better show the symbols when playing.

  • Reels: 6
  • Paylines: 4,096
  • Special Symbols: Wild (Sunset), Scatter (Diamond)
  • Features: Substitute, Free Spins

Zeus 3

Last but certainly not least on our list of famous slots from WMS we have Zeus 3. This is often times featured as one of the best games and it will change things up a bit with its very different screen. While most online slot machines have three rows of symbols on five reels, Zeus 3 has two, three, four, five, six and seven symbols on its six reels, respectively. It only takes a few spins to get used to the design and become immersed in the action taking place on Mount Olympus. The main wild is the image of the temple but when Zeus takes up an entire reel, it transforms into a stacked wild.

  • Reels: 6
  • Paylines: 192
  • Special Symbols: Wild (Temple), Scatter (Lightning Bolt)
  • Features: Substitute, Free Spins