why are some people mad that super mario galaxy 2 got a 10 in some reviews?

[Kyuubi Ricky SSJ2]

morenoingrato said:
Acoccording to IGN's users:
"It doesn't have blood, so it isn't realistic"
"It isn't a HD game"
"It isn't M rated"
"It got a better score than Red Dead: Redemption"

You forgot to add:

"It doesn't have any guns in it."