https://www.gamespot.com/articles/god-of-war-ps4s-kratos-has-changed-and-the-soundtr/1100-6458381/

The opening track to God of War begins with dark, pounding percussion and a deep, male choir chanting a series of ominous notes. It's a repeating motif that perfectly speaks to the Kratos we've known for decades, a brutal god-slaying monster. But there's another motif that accompanies it, a more uplifting series of horns and strings that seem almost hopeful. It hints at a calmer Kratos, though still prudent and stoic--it's the side of him that we see executed so superbly in this new game in his interactions with his son, Atreus. But the hook of the deep ominous chants remains, like the Ghost of Sparta that still haunts Kratos, and it's a sound that will continue to haunt you throughout God of War.