No there arent  other gow unions  only us.

 Dudes this awesome

Maybe Kratos will have a child that hate him and want to destroy him you know like father-like son

There are many contributing factors to the arguably purposturous strength displayed by Kratos:

-Spartan Training

-Service to the God of War

-Wielding the BoC

-RAGE *revenge*

-lack of subtlety by aformentioned anti-hero *making his strength seem even greater*

-Exposure to Pandora's Box *I don't think so but it is possible*

-Being of demi-god blood *possibly*

-Being child to Zeus *consider that nothing is canon until made so in the MAIN story arc*

-Becoming a god *even after losing some of the power that comes with it*

-The man is f***ing determined

~These are some things I believe could be counted as contributers to his might

the-creeper

i agreed almost all the facts that makes him a powerful warrior