According to analyst Mat Piscatella State of Decay won May NPD , State of Decay 2 are doubling their sales compared to the fist State of Decay.
While God of War drop to second on NPD (which is still amazing) and Detroid become Human are on third rank . But overall Total video games sales are up 13 % in May and 15 % YTD .
So this is a good sales despite a mixed reviewed and decent metascore of the games , and clearly the games is still supper bugy and a lot need to be fixed, I hope they add more content as well.
So people who underestimate sales and marketing people please don't relate games quality to sales performance, a games maybe bad in terms quality, but it can sell a lot if they can marketed well.