Kratos kills himself to release Hope to the human race. This is his last “**** you” to the gods as he saw Athena, an Olympian, trying to take power to possibly enslave humanity once again. With hope the humans will no longer need the gods and they will be forgotten, putting an end to Olympus once and for all.

How did Kratos survive killing himself?

After his recovery and defeat of Zeus, Kratos was pressured by Athena to return her power, but Kratos instead killed himself with the Blade of Olympus, releasing Hope to mankind. ... This ironically contradicts her previous actions, as she had once saved Kratos from death.

How many times has Kratos killed himself?

He's died 3 times already and made his way out of Greek Hell. Barlog said he can't. As for the last part that might make a great ending/boss fight for the Norse era of God of War games.