So Infamous is a flop: why did Sucker Punch fail?

[episteme]

81 isn't a flop and it wasn't totally unexpected.
inFamous: 85 -> inFamous 2: 83 -> inFamous: Second Son: 81

And it won't affect sales that much. CoD: Ghosts and Killzone: Shadow Fall had scores in the 70's and sold very well.