In a cut scene, after bringing Tyr to his senses, Atreus tries to give him a spear, which Tyr rejects. He leans the spear against a wall. When the game is given control back to the player, if you turn to look at the spear, it is gone.
Mimir and Kratos warn Atreus about how Lunda the Blacksmith can be really friendly and say Atreus hasn't met her yet, but if you stop at the blacksmith in Vanaheim before finding Freya, Atreus had already met her and talked to her as if he knew her.
How exactly did Kratos make his way from Greece to Midgard? The Greek religion and the Norse religion are both separate religions. Also, both Odin and Zeus claim to be the creators. How can this be? Did Odin and Zeus know each other? There is no explanation as to how both stories connect, or how the concept of the nine realms connect with the Greek realms.