@sales2099
To be honest you don't have much of an argument. It's very normal for sequels not to sell as good as the original release. It's been that way from as long as I can remember. Some examples:
http://gamrreview.vgchartz.com/sales/3108/donkey-kong-country/
http://gamrreview.vgchartz.com/sales/3109/donkey-kong-country-2-diddys-kong-quest/
http://gamrreview.vgchartz.com/sales/3111/donkey-kong-country-3-dixie-kongs-double-trouble/
http://gamrreview.vgchartz.com/sales/6301/jak-and-daxter-the-precursor-legacy/
http://gamrreview.vgchartz.com/sales/1045/jak-ii/
http://gamrreview.vgchartz.com/sales/1046/jak-3/
It's a normal cycle in a gen.







