WMS has actually been around for decades. The company was founded in 1943 and originally operated as a pinball and arcade game provider. However, once online casinos began to be more popular, WMS branched out here too. It wasn't until 1994 that WMS actually started creating and producing slot games. Finally, in 2013, the company merged with SG Digital and this is when it fully moved forward with creating online slot games including a wide range of branded content.