The add-on content was announced as part of the annual Game Awards 2023.
The add-on content follows Kratos on a deeply personal and reflective journey toward a future he never thought possible.
It brings him to the mysterious shores of Valhalla accompanied only by Mimir.

During each attempt, Kratos will learn and adapt to the various challenges.
adds the blog post.
Valhalla features five difficulty modes, with the highest difficulty setting being Show Me Mastery.

Sony says God of War Ragnarok: Valhalla is a separate experience from the original God of War Ragnarok.
This means you might play the game whenever you like without worrying about upgrades or progression.
