Popiplay is a maker of digital slot games. Their web site (see link below) has easy access to play them for fun. They kindly indicate the RTP in the game help screens, which few companies are open enough to do.

Master of Lightning -- 96.11%

 

Wild Witches -- 97.11%

 

Queen of the Nile -- 97.11% 

External Links

popiplay.com — Corporate web site.