Kratos seeks revenge on the gods, so he plans on killing all of the gods 1 by 1, first, with the help of the Titan Gaia, as Kratos jumps on Gaia's head, he was able to find Poseidon. When Poseidon saw Kratos, Poseidon immediately turns into a giant- controlled by Poseidon, and the original Poseidon was in his heart. Poseidon said

"You challenge me mortal!? A God of Olympus?!* Kratos : *A true warrior does not hide, Poseidon, leave the sea and face me! Poseidon : *You have disrespected the Gods for the last time Kratos!!