From Diablo Wiki
Quests lead the story and progression of Diablo 3.
 What Are Quests?
Quests are the meat of Diablo's plot, story, and progression. They must be followed to progress.
 How Quests Work
Quests are triggered and continued by following the instructions below the minimap on the side of the screen. When completed, they provide experiance and gold (only), which is a big change from how the Diablo II quest system worked. In addition, all quests must be completed, one after another in the order they are given. There is no way to fail a quest in Diablo III. It is possible to have a high level character "carry" you through content, until you reach level caps. It is even possible to powerlevel through the content.
 Quest Interface
The final quest interface was modified from the blizzcon versions. The final version consists of a small description of the task to accomplish, and a journel entry for whatever class the player is using. A very easy way to check what is needed to be done on a quest is to look to the right of the screen, which has the instructions on how to progress in the quest.
 List of Quests
Below are all the quests in Diablo III.
Events are mini quests that build off, but are not directly connected to (usually) the main quests.
 Act I Quests
Act I has 10 quests. The following quests are in Act I:
- The Fallen Star
- The Legacy of Cain
- A Shattered Crown
- Reign of the Black King
- Sword of the Stranger
- The Broken Blade
- The Doom in Wortham
- Trailing the Coven
- Imprisoned Angel
- Return to New Tristram
 Act II Quests
Act II has 10 quests. The folling quest are in Act II:
- Shadows in the Desert
- The Road to Alcarnus
- City of Blood
- A Royal Audience
- Unexpected Allies
- Betrayer of the Horodrim
- Blood and Sand
- The Black Soulstone
- The Scouring of Caldeum
- The Lord of Lies
 Act III Quests
Act III has less quests than the other acts, with only 7. The following quests are in Act III:
- The Siege of Bastion's Keep
- Turning the Tide
- The Breached Keep
- Tremors in the Stone
- Machines of War
- Heart of Sin
 Act IV Quests
Events are small sub-quests that have a random chance to spawn in an area. They can appear accross every act besides Act IV. Typically, they consist of completing a task for an npc, such as the Matriarch's Bones event or the Forged in Battle event.
 Quest Development
Kevin Martens: The questing and story. I think we’ve added way more quests, more variety of quests. We’ve randomized the quests, and have these sort of quests that are self contained. For example, if you enter a dungeon in Diablo III, there might be somebody standing at the entrance, like a treasure hunter, saying, “Hey, I heard stories about The Idol of Rygnar is hidden somewhere in this dungeon. Help me find it and you can share in the reward.” Then you go through the dungeon and protect this guy. Then you’ll find the idol and you’ll get the reward.People will turn on you…you’re never quite sure what is going to happen. We’re adding all those random elements all over the world. There is way more quest content overall than Diablo II, period. Also, I think we wanted to do a much better job on the storytelling aspects, not just the cinematics, which are fantastic, but also in the storytelling itself, like more twists and turns, more interesting quests, more variety of experiences. That’s what we spent a lot of time on, and making the co-op nature of it better as well.
This was one of the first statements blizzard made on behalf of quests in diablo III. As you can see, blizzard was origionally intending to make quests diverse, interesting, and much improved to diablo 2.
At Blizzcon 2008, a couple of quests were playable. They were:
All were featured in Tristram/ nearby dungeons. Quest rewards were small items (random boots and the like). Only the skeleton king quest appeared in the final game.
- Find Alcarnus*
- Blood Money
- The Lost Girl
- Alesar's Pendant
- The Collapsing Tomb*
- The Lost Wagon
- The Necromancer's Book
- A Miner's Gold*
- The Idol of Rygnar*
Some of these quests appeared in some form or another in the final game (*'s). Rewards were items and experiance.
A couple small quests appeared at Blizzcon 2010. They were:
All 3 of these quests appeared in the final game, although the first mention was expanded upon as the Imprisoned Angel quest.
 Early Stances
Julian Love: It's not so much actually high level versus low level. I think we have a plan that facilitates high level content. What I think you're really getting at there is replayability, and what that gets down to is the way we're exercising randomness within the game. We've put a lot of focus towards what kinds of randomness are really beneficial in supporting replayability and what things are just, heh, not all that important or not all that awesome. One of the things that we have in the system that we have is something that we call - well, we have a really technical name for it -- sub-scenes.What it comes down to is we can sort of like create a hole in the world that's like a socket that we can fill with just about anything that we want. It could be empty ground with a bunch of monsters on it, it could be a giant canyon that a really elaborate scripted event happens, it could turn into a caravan walking across the desert that you have an escort quest on. The point being is that this hole in the earth can randomly, at any time become something totally different. It could even be a doorway to a whole new dungeon that you've never seen before. So, the fact that the world is able to change things up and actually deliver different events, stories and quests is what's really going to make the game a lot more replayable at the both the low and high ends.
This was somewhat implamented in the final game, but not to a great extent.
This did appear in the final game in the form of events. However, the main story is completely static.
 Randomized Quests
Jay Wilson: We are still discussing whether or not we would like to include class-specific quests in the game mainly because of the simple fact that it may not really fit in with the fast-paced play-style known to the Diablo series. While this is definitely something we would like to consider, we just haven't agreed on how just yet.However, we would like to do something in regards to character specificity. We are looking into having different dialogues and experiences for the same quest or interaction for each of the classes. Each character will react differently and have different responses for different scenarios. For example, the Barbarian may do or say one thing in response to what an NPC has to say, whereas a Witch Doctor will treat the encounter in a complete opposite manner.
Jay Wilson: Not a a lot but I can tell you we do intend to do some class quests and mostly what we want to do is give [[story]] arcs to the characters. We don't want them to be kind of nameless...I think we've reached a point where we are trying to build a universe and a universe is filled with characters. And so a lot of what we want to do with the class quests is support that idea to build characters.
: So when you start the game will the different classes begin in the same place or will you start at some sort of origin level to setup your character?
Blizzard has not yet added class specific quests in Diablo III.
Long story short, blizzard appears to have had goals for making quests more interesting but ended up scrapping most of it, and now we have what we do today.
 Quests in the Expansion
No changes to quests have been made so far in the expansion Reaper of Souls.
|Quests & Events of Diablo III  Act I Act II Act III & Act IV Act V|
|Act II Quests||Act II Events |
|Quests Act III||Events Act III||Quests Act IV |