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Updated: Jun 2025
If you’re a fan of online slots, we believe that you’ve at least heard of WMS games, which include a variety of free slots options. Our experts here at FreeSlots99 would also be willing to bet it’s one of the greatest slot providers out there today.
| Founded | 1991 |
| Number of Games | 100+ |
| Game categories | Slots, Video Poker, Progressive Jackpot Games |
WMS is a US company that was primarily focused on making land-based gaming terminals and machines. If you’ve by any chance walked into one of the casinos on the Las Vegas Strip, you’ve probably spotted at least a few of their online slots.
However, with the advancement of the online casino industry, we saw lots of the classic WMS gaming slots reaching online gaming hubs and casino sites. Take our platform, for example – here at FreeSlots99, you’ll find more than 270 demo games from the popular software, allowing you to play for free.
They made great games from the early days of three and five-reeled slots, and all the way to the modern era with bonus features, high volatility, and the ability to gamble for real money, as well as play free slots.
Plus, did you ever get the chance to play so many branded slots from other providers? We certainly haven’t so we especially liked the thrill of titles like Wonder Woman, Seinfeld, Star Trek: Red Alert and others!
A constantly updated list of the great American online casinos that
have WMS casino slots. This casinos are sorted based on our rating and quality of their current
bonuses. We only show casinos that accept players from your location.
18+, T&Cs apply. Casino list
updated: June 2025.
As a software, WMS was founded in the 1970s, but they were very far away from today’s business model. Of course, online gaming was not even in the plans back then, so they made their way through the industry by making land-based machines and terminals, eventually leading to their involvement in online gambling. WMS quickly made a name for itself as a major software for major Las Vegas and Atlantic City casinos, and now continues to thrive in the online gambling market.
If you’re among our more experienced readers, you probably still remember 1996 when the popular Reel ’em In was released. We can say that it marked the start of a great run that stretched all the way to 2013, producing blockbuster titles found in every Vegas casino like The Black Knight, Jungle Wild and their all-time classic – the Zeus series.
During more than two decades of producing top-tier gaming releases for both online and land-based venues, WMS received quite a few awards. Back in the late 2010s, the software received four awards, being listed as Casino Journal’s top 20 providers of the year a few times in a row.
Along with those, the brand also acquired eleven different Manufacturing Leadership Awards for the release of their innovative progressive jackpot slots under the Colossal Jackpots series.
Before the 2010s, we never really saw much of WMS casino slots available on mobile, but that quickly took a turn in the following years. For players interested in WMS slot machines download, some of their classic games like Zeus, Bier Haus and Gold Fish first received mobile updates, and we were all up for it!
Since then, we have seen loads of WMS mobile slots being optimized for mobile play, and we feel like that even solidified the reputation of the brand in the modern industry. Now, together with their new parent brand, Scientific Games, the company continued making Vegas-esque releases through the Invaders from the Planet Moolah and Lock it Link series.
To show you how impactful WMS has been in the iGaming industry, our team decided to give you a few recommendations of their best releases, including options to play for free. Having in mind there are nearly 300 of their games to try, we didn’t have an easy job, but here are some of our favorites.
Since our tSince our team at FreeSlots99 consists of passionate players like yourself, we know what you’re after here. Don’t worry, we’ve got you covered with the list of the top-paying WMS slots to try. If you’re still new when it comes to software’s games and wish to play WMS slots online with the highest chance of winning, make sure to check out these.
Among these, our team members have a weak spot for the Zeus III title since it simply delivers one of the most exciting online slot experiences. Features like stacked premiums and 192 paying ways on top of the 96.1% RTP make it a worthy successor to the original Zeus slot, which has captivated many players in real money slots. Plus, it can easily pay over 1,000 times the bet, and you can find it in our library of free WMS slots right here!
Other great games you can try for free at FreeSlots99 include the sequel to the famous BierHaus – the Bier Haus Oktoberfest, coming in hot with a max win higher than 1,300x. We also can’t forget the Raging Rhino release which popularized WMS casino games even more with 4,096 paying ways, a 6×4 grid and extreme volatility with the potential to pay out up to 1,000x.
We have to say that WMS is one of the players’ favorite software providers when it comes to the sheer number of players spinning the reels of their WMS Gaming slot machines variations, including those with unique ways to win. If you ask our experts, it’s to be expected, considering how popular the manufacturer was before while making land-based gaming machines.
However, there’s also something in all those innovative features that the brand managed to popularize. We’ll only give you a mere glimpse of what to expect out of each game from the famous brand, but we promise it will provide thrilling gameplay.
You can discover the old-school ways of playing with their titles, and we found that to be exceptionally valuable in today’s iGaming sphere. You’ll constantly find releases with multiplier action or other modern-day popular features, but WMS was among the first providers to create engaging and unique titles with features that stand out from the crowd and the modern-day standard.
That’s also why we love their releases, and it’s a shame that one of the greatest game developers no longer makes those old-school types of titles, like the Wizard of Oz slot game. Still, we can see that they are doing just fine in their new role under the Scientific Games brand, and one thing is for sure – their old-but-gold classics will forever remain engraved in the history of online casinos. Don’t just take our word for it – play WMS slots online for free on this page and learn for yourself! We share the love of innovative mechanics inherent to their gaming hits that gamblers from all over the world adore.
Filip Gromovic is a senior slots reviewer here at FreeSlots99 with over five years of experience evaluating the latest drops in the world of iGaming.
Being a slot fan himself, Filip approaches slot ratings just the way we like it – professionally, but also from a player’s standpoint.
That enables him to give his unbiased take on the slot’s features, gameplay and design, while only recommending top-tier releases to our readers.
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