Blizzard’s Diablo 4 is one of the most successful games of the year in the action RPG genre, and its first major expansion, Vessel of Hatred, is set to add even more excitement to the dark and gritty world of Sanctuary. A common question arises to whether you can play the expansion without owning the base game. As expansions often build upon the original game’s foundation, it is important to know if Vessel of Hatred is a standalone experience or if it requires Diablo 4.