
Even though Diablo 4's story campaign is dense and filled with plenty of great side content, it ultimately just represents the beginning of your adventure in Sanctuary. Once you complete it, you'll be able to engage with all of the various endgame activities in Blizzard's latest hack-and-slash ARPG, including the fearsome (and rewarding) Nightmare Dungeons.
Grinding Nightmare Dungeons for their rewards is something you should do often in Diablo 4's endgame, so it's important that you learn everything there is to know about them. In this guide, we'll help you do just that with a full overview of what Nightmare Dungeons are, how to unlock them, what their rewards are, and more.