I think its because there are so many great games this year and with the low marketing/hype + reasonable (but not great) reviews mean people will rent it or get it later. I didnt even know it was being released until i saw the charts.
<a href="https://psnprofiles.com/fauzman"><img src="https://card.psnprofiles.com/2/fauzman.png" border="0"></a>