Diablo 4 boasts a fully open world, which will play a significant role in the game's content. The open world consists of five vast regions, namely Dry Steppes, Fractured Peaks, Howling Plateau, Scosglen, and Hawezar. There is also a sixth region, Hell, but little information is available on that section. The game's primary objective is to follow the main quest line, which will lead players to all five regions. As an open-world game, players are free to explore any region in any order they want. After completing the main campaign, players can skip it on any alt characters, allowing them to level up in Diablo 4's adventure mode. In addition to the main campaign, there will be hundreds of side quests scattered throughout the zones, some forming part of a bigger side quest chain specific to a single settlement or city in the game.

• Open World content
• Open World Quest
• Open World Bosses
• Renowned system
• Shrines of Lilith
• Fields of Hatred
• HellTide
• Tree of Whispers
• Mounts

↖ Open World content

In Diablo 4, the open world is filled with a ton of additional content that players can partake in. The open world events are always colored orange and players can easily find them by looking for the orange circle in the area. These events offer a variety of different activities that players can engage in and they provide additional experience, gold, gear, and murmuring ovals, which are used as currency to gamble for gear at vendors in the main cities of the game.

Players will also come across a ton of different sellers in the open world, which are small side activities that can be completed for chests filled with loot. Additionally, strongholds are a much bigger piece of the open world, offering players a difficult challenge and the chance to take over the area, turning it into a settlement with vendors, quest givers, and other crafting NPCs. Completing strongholds early on is crucial for unlocking additional quests and crafting materials.

Crafting plays a massive role in Diablo 4, and the open world is one of the primary sources of materials. Players can harvest clickable ore, deposits, and flowers throughout the world, and creatures and animals killed in the open world can also drop materials. Very rare materials can be obtained by defeating difficult bosses, including world bosses that are found out in the open world.

↖ Open World Quest

Questing will take you to all five of the different regions, and with this being an open-world game, you're actually able to go to any region you want, whenever you want. You're able to do the main campaign in any order you want, so on one playthrough, you could start at Scosglen, and on another, you could go to Dry Steps. But also, after you complete the main campaign once on one character, you are able to skip that campaign on any other alt characters, which will allow you to level up in what's essentially the adventure mode of Diablo 4.

After completing the main campaign quest, there are also going to be hundreds of side quests throughout all of these different zones. There are tons of side quests in all the main hubs or any of the cities or settlements you visit, and then there are just going to be random quests you find scattered throughout the world. These side quests aren't just one-and-done pieces of content. A lot of them are actually part of a bigger side quest chain that usually is tied to a single settlement or city in the game, and they usually build up to have a conclusion.

As you're exploring this open world and following your quest, you're going to find a ton of additional content that you can partake in. First off is the open-world events, and these are always going to be colored orange. It's usually going to pop up an orange circle that shows you what area to go to, to partake in one of these different events. There are going to be a ton of different events, and they can possibly be dozens and dozens of different potential events you can come across. These events are also going to be pretty important because not only are they going to award a bunch of additional experience, gold, and gear, but they're also going to give you murmuring ovals, which are the currency that you can use to go gamble for gear at a vendor in the main cities of the game.

↖ Open World Bosses

Diablo 4 will feature world bosses, which players can participate in while they are still leveling up. These bosses will be difficult and players can team up with up to 12 people to fight them. Defeating these bosses will grant players specific materials that can be used to add sockets to pieces of gear. The game will have four or five world bosses available at launch, each on different timers.

↖ Renowned system

The game will also introduce the renowned system, which rewards players for completing various content in the game, including dungeons, strongholds, sellers, and finding shrines of Lilith. Completing these objectives will earn players renowned points, which will unlock different rewards. Some rewards are account-wide, while others are character-specific. Account-wide rewards include increased potion-carrying capacity, more skill points, and more paragon points. Permanent rewards will apply to all characters on the player's account.

↖ Shrines of Lilith

Shrines of Lilith are part of the renowned system and provide account-wide stat increases. Each shrine of Lilith will grant players a permanent stat increase of plus two to any of the main stats in the game, such as strength, intelligence, or wisdom. There are hundreds of shrines of Lilith in the game, and finding them will be a significant part of the exploration.

↖ Fields of Hatred

The Fields of Hatred will be the PvP system in Diablo 4. The game's open-world content will include dungeons, side quests, shrines of Lilith, and the Fields of Hatred. Exploring the game's open world will be essential to finding all of the different pieces of content. The game will have a mix of open-world and instance content.

↖ HellTide

In Diablo 4, once you complete the main campaign or reach level 50, you will enter the end game where there is a lot more content in the open world. One of the new systems in the end game is the HellTide, which are invasions of Lilith and her armies taking over a region of the open world, with demon bosses and rare uber bosses. Players can fight together during Hell Tides, which starts appearing in World Tier 3, and use a new currency to open Hellite-specific chests to target farm-specific pieces of loot.

↖ Tree of Whispers

Another end-game system in the open world is the Whispers of the Dead or the Tree of Whispers, which is essentially the bounty system of Diablo 4. The Whispers of the Dead are objectives in the open world that players can complete for gold, experience, and specific loot. Completing any of these whispers gives players Grim Favors, and once they get 10 of these favors, they can choose a cache of loot from the Tree of Whispers, which will be targeted pieces of loot in these caches. Completing these whispers also gives players Nightmare Sigils for the Nightmare Dungeon system.

↖ Mounts

Mounts are another new addition to the game, allowing players to increase their movement speed to traverse the massive world more easily. Each class will have its own class dismount ability that will play a little bit into combat, with dismount abilities said to be very strong. There will be other mounts and mount cosmetics that players can find and obtain by completing different objectives or feats of strength in the world.

Lastly, it's worth noting that all of the open-world content mentioned above is end-game-only content. Therefore, these systems are only going to start occurring once players complete the main campaign of the game, and then the open world is just going to have these hundreds of different objectives that are cycling multiple times a day for players to go complete and farm for more loot.