WMS Gaming is an American slots developer that is active in both the online and land-based gambling industries, and noted for popular online slots such as Raging Rhino and Buffalo Spirit. This company’s offline operations are extensive in the United States and is responsible for several key developments in slots technology.

Best WMS Gaming Casino Sites

The history of WMS Gaming goes back to the 1940s through then-parent company, Williams Manufacturing Company. Early on, Williams Manufacturing was focused on amusement games and early pinball machines. They innovated several developments in the pinball industry such as the tilt mechanism and inward facing flippers that are now found at the bottom of nearly every pinball machine.

Williams Electronics, Inc. was then established in 1974 to enter the coin-operated arcade games market. During that time, they developed a number of high popular arcade game titles. Williams then took up the gambling machines market in 1991 by spinning off a new division called Williams Gaming.

Williams Gaming / WMS Gaming formally entered the modern slot machines market in 1994 and were instrumental in modernizing the slots market. At that time, slots were limited in function and stuck to the safe, classic themes featuring card suits, fruits and liberty bills. WMS Gaming introduced games with completely new themes and released the first ever multi-line video slot and released several highly popular slots in the 90s. Two notable titles developed around that time by Williams include Jackpot Party and Filthy Rich.

As the arcade and pinball industries dried up around this time, WMS Gaming began focusing exclusively on slot machines. They had great success there and began an industry trend of acquiring licensing rights from popular entertainment franchises. Some of their most popular licensed slots were themed after major brands such as Men In Black, The Wizard of Oz, Monopoly, the Lord of the Rings and more.

In 2013, Scientific Gaming (parent company of SG Interactive) took over WMS Gaming but kept the company operating under its existing brand name. WMS Gaming continues to produce slots for brick-and-mortar casinos and online casino sites alike. Some of its most popular real games today include Willy Wonka, Tropical Fish, Invaders: More Moolah, Reel riches, Mouse Trap, Austin Powers and Easy Money.

WMS Gaming Slots

With a long history in the business and a presence in highly regulated markets such as the United States, WMS Gaming is trusted and mostly liked by players. WMS Gaming slots do not have the greatest graphics and are beginning to look a bit dated by today’s standards, but the math behind the games is solid and gives players a nice balance between getting paid while still maintaining large jackpots. Their games also include a nice variety of bonus rounds to keep things fresh.

However, some WMS Gaming slots are notoriously volatile as they lean towards bigger, less frequent prizes. One of their most well-known online slots is the infamously high-variance game Raging Rhino. This game is known among players as one that can pay insanely high prizes, but is also relentlessly high-variance.

In other words, players can go long stretches without winning anything of significance before finally hitting a massive payout. The game is equal parts frustrating and rewarding. Raging Rhino even earned a spot in our top-10 list of the highest variance slots.

Other online slots produced by WMS Gaming include Super Monopoly Money, Buffalo Spirit, Double Buffalo Spirit, Bruce Lee, Amazon Queen, Super Jackpot Party, Wizard of Oz, Crystal Forest and many others.

In 2011, WMS Gaming got into running online casinos with the opening of JackpotParty.com for customers in the UK and parts of Europe. One thing they did differently than other casino sites at the time was to run a site-wide progressive jackpot that was constantly growing and could be triggered at random on any game, at any stakes at any time.

WMS Gaming sold JackpotParty.com to SkillOnNet in February of 2014 for an undisclosed amount. SkillOnNet closed the domain and moved the casino to SlotsMagic.com, but kept many WMS Gaming slots on offer in addition to expanding the game variety by bringing other software developers on-board including NextGen and Amaya.

Slots Video Previews

Below are a few video examples of WMS Gaming slots in action. This is just a small collection of the many slots that have been released by WMS Gaming over the years.

Super Monopoly Money


The Wizard of Oz: The Road to Emerald City


The Lord of the Rings: The Return of the King