Definitely. There are collectibles in the River Pass post - story. The game designers intended for players to have the option to go back and fully explore. You can find things like Odin's Ravens, which are scattered around. Also, there are some lore - related collectibles that give more depth to the game's world. By searching for these after the story, you can enhance your overall understanding and enjoyment of the God of War universe.
Yes, you can. There are still various collectibles in the River Pass even after the main story is completed. These can include things like hidden chests, artifacts, and more. It's a great way to fully explore the area and get all the goodies you might have missed during the initial playthrough.