PALM SPRINGS, Calif. -- Brian Christopher is a gaming influencer with massive followings on his YouTube channel and Facebook page. When Gaming Arts, a gaming machine manufacturer, reached out to Brian to design his own slot machine, he couldn't pass up the offer.

The Ugga Bugga slot machine game has the highest payout percentage, at 99.07%. The second highest is Mega Joker by NetEnt, with a 99% RTP. Jackpot 6000 by NetEnt and Uncharted Seas by Thunderkick come in second and third, with RTPs of 98.8% and 98.6%, respectively.