Funny fact: The bigger Gears of War game ( Gears of War 3) is still bigger than all Uncharted games. 
First week
Gears of War 3 ~ 3 million
Uncharted 4 ~ 2.7 million
Too bad we have not LT sales for Gears 3, so i don't even can say if lifetime Uncharted 4 will beat it.
Though i think Uncharted 4 will do almost 11 million lifetime, i don't think Gears of War 3 is that huhg, but still, we don't know.
First week
Gears of War 3 ~ 3 million
Uncharted 4 ~ 2.7 million
Too bad we have not LT sales for Gears 3, so i don't even can say if lifetime Uncharted 4 will beat it.
Though i think Uncharted 4 will do almost 11 million lifetime, i don't think Gears of War 3 is that huhg, but still, we don't know.