It was free, unexpected, and essentially shadow-dropped, but the Valhalla DLC for God of War Ragnarok turned out to be one of the best expansions for a PlayStation game in recent memory. Valhalla thoughtfully underscores Kratos' emotional journey, driving home the main themes of the base game while packaging itself in a well-designed and addictive rogue-like format. As great and conclusive as Valhalla is, it might not be God of War Ragnarok's last expansion.