These online casinos are using the Real-Time Gaming (RTG) casino platform. RTG was established in 1999 and is now based out of Costa Rica. They are one of the top casino software providers on the market today. Most of their casinos continue to accept players from the US, and that is the reasons why their software continues to be so popular with players. You will find no deposit bonuses within this section that you can redeem to play their games.