Biggest drop in sales in a game series?

[bouzane]

DirtyP2002 said:
LittleBigPlanet: 5.77 million
LittleBigPlanet 3: 1 million

LittleBigPlanet 3 has sold 1.46 million, not 1 million. Also, it as only been on the market for 19 weeks, the original had sold 2.12 million in the same time frame. That is not exactly a drastic change.