The Difference in The Spectrum of Games There are two reasons for the difference in the spectrum of pg slot game games. On the one hand, there are software developers that have been on the market for many years, while others have only joined in the later years and for this reason have not yet been able to develop as many games as the market-leading companies. On the other hand, the big developers, such as Microgaming, launch several games every month, while the smaller companies only sporadically introduce a new game to the market.