The Making of a Popular Casino Slot Game There are thousands of different casino slot games out there. There are ones based off of movies, TV shows, legends and celebrities. Some of these slot games are extremely popular, while others sit in the corner of a casino where no one plays them. Which leads many people to wonder, what makes a casino slow game popular? There are a number of factors and game features that go into making a casino slot game popular. Here’s a look at some of the factors and game features that could help make a casino pg slot game popular.