There are all kinds of quests in role-playing games. There are the ones that are part of the main storyline, side quests that players can take for extra money or experience, or hidden quests that players can find in the wilderness. Diablo 4 has a healthy selection of all three, and the player usually finds the most interesting quests by accident.
The hidden quests of Sanctuary aren't the most difficult to finish, and they're often just delivery tasks, but there's always a twist and an interesting story involved. These are often the most satisfying quests to finish in Diablo 4 because finding them is often no more than a happy accident.
6 Late Shipment
While destroying human enemies like Scrappers and Throatslitters in the dusty ruins of Kehjistan, one of those enemies might drop a distinctive item called "Battered Shipment." The quest starts as soon as the player loots it, and it appears in their log. The only thing they have to do is return it to the owner.
The NPC's name is Aih'Setal, and he's in the biggest city in Kehjistan, Geal Kul. It's close by on the southern coast. Return it to him and he rewards the player with a Salvage Cache and a handful of gold.
5 Gem Laden Geode
Another great reason to farm iron is the possibility of finding a Gem Laden Geode. This is a random drop that players can find in any iron node in Hawezar.
There's a whole series of quests in this same category that the player can find and start in a similar way; there are also Ice Laden Geodes and Glittering Geodes, for example. Herbalists farming plants in northern regions can find other rare flowers such as Frostbloom, which start a similar hidden quest that leads back to an NPC in Kyovoshad.
The description of the item itself isn't very specific, saying only that a silversmith with special tools is the only one who can break open the geode and harvest its shiny contents. Check the quest summary where it appears in the log for the "silversmith" in question, who will likely be the nearest Jeweler.
4 Exorcists's Cache
It's just as pleasant as it sounds, and where it drops is even better. Bundle up in the best furry transmog and head into the Frigid Expanse to kill skeletons and ghosts, and eventually one of them will drop the Sealed Exorcist's Cache.
Once the item is in the character's inventory, it automatically starts the quest to fill it up with anima from the ghosts, undead, and other unpleasant critters in a certain area. They appear as red dots on the map, and once they are killed, the anima shows up as white dots. When the cache is full, the quest is complete, and the player can open it to get their rewards.
3 Message In A Bottle
Every role-playing game that has a coastline of some sort is going to have a Message In A Bottle quest, and this is the one for Diablo 4. Head due west from the Drowned Burrow Cellar to the Razor Shoals to find a Washed-Ashore Bottle. It contains a Bundled Heirloom With Letter, and it's addressed to Padrig, the sender's estranged son, in the small town of Corbach to the south.
The heirloom is an ancient Druidic amulet that Padrag can't use. He gives it to the player as part of their reward, and it's a rare neckpiece that can be worn by anyone to give a boost to elemental damage resistance.
2 Secret Of The Spring
There are a few quests that require the player to perform a certain action, like an emote at a certain person or object, to either move the task along or complete it. The Secret of the Spring is one such quest, and it can be found directly north of the Cathedral of Light in Kyovashad.
Unlike other hidden quests that start when players pick up a special item, this quest starts with a shabby old note that can be found in a mess of ruined scaffolding. It reads, "Beacon of warmth in winter’s embrace, patience rewarded by nature’s own grace.”
The note contains directions to the spring, which is also in the Frigid Expanse. Upon arrival, the player might have to kill some enemies before they have a chance to emote /Wait as they stand next to the steaming pond. A treasure chest will appear and other rewards include some extra renown for Fractured Peaks.
1 Better Days
One of the better quests when it comes to a stand-alone storyline, but the player has to complete certain prerequisites before Better Days becomes available. It starts when the player loots a Faded Old Painting from an enemy in the Dobrav Taiga, and provided they've already completed Legacies of Light's Watch and interacted with Zalan Coste, they can bring the painting back to him for further information.
Zalan is in Margrave, right where the player left him. He describes it as something subversive that would displease the church and commits to hiding it. This leads to the Unwritten End, another hidden quest in the same zone.
Diablo 4 is available now on PC, PS4, PS5, Xbox One, and Xbox Series X/S.