Pokies scale based on screen size played at your experience may vary, especially on older smartphones. Special WMS features and technologies: Williams Interactive has focused on online poker world series of poker innovations, online slot games and physical cabinet design since its incorporation into Scientific Gaming. Unusual reel structure can recognize WMS free slots: 6 reels instead of traditional 5/3 sets. Sometimes spins are arranged in special ways to include bonuses or cascade mechanics. WMS Gaming has established a solid reputation for manufacturing innovative software and slot machines over the years. The company also offers mobile slots and online platforms so that players can access their products through on their desired device. Based out of Waukegan, Illinois, the gaming giant is expected to become a subsidiary that will be fully owned by Scientific Game Corporation, by the end of 2013.