As well as the original Rainbow Riches games, the new website will offer players a range of new and exclusive versions, all provided under the OpenGaming banner.
These include Daily Rainbows and Leprechaun’s Harvest, both of which have daily and monthly free-to-play options.
Dylan Slaney, SVP Gaming at SG Digital, said: "With Gamesys’ latest move to the Open Gaming System platform, we are delighted to bring this new casino offering to the market in partnership with Gamesys Group plc and look forward to its success."
Simon Mizzi, Marketing Director at Gamesys Gibraltar Group, said: "We are really excited to bring this unique casino offering to the many Rainbow Riches players who play these games every month.
"RainbowRichesCasino.com was created with these players in mind and it brings an array of entertaining games and exclusive Rainbow Riches themed content for players to enjoy in a safe and responsible environment."
