What is the ruling on the PlayStation game "God of War," which is about the pagan Greek gods, and does it affect the children of the Ummah?

It is not permissible to play with toys that carry beliefs contrary to the creed of Islam, nor to sell or acquire them. One must be wary of them and keep children away from them. Playing with them merely for entertainment, even while believing in their falsehood, does not remove the sin.