Event

Events are optional side-quests in Diablo III. They can spawn in the same area each time a map is reset. Some events need to be fulfilled to complete some achievements.

Many events can be nominated bounties. In addition to the listed events, many scripted mini-events exist, and even though they are unmarked (i.e. do not have a notification of an event starting), they are still fixed sequences.

Many events include fighting with elite monsters.

Act I

 * A Reputation Restored
 * A Stranger in Need
 * Carrion Farm
 * Eternal War
 * Jar of Souls
 * Last Stand of the Ancients
 * Matriarch's Bones
 * The Apothocary's Brother
 * The Crumbling Tower
 * The Cursed Bellows
 * The Cursed Camp
 * The Cursed Cellar
 * The Cursed Chamber of Bone
 * The Cursed Chest of the Khazra
 * The Cursed Court
 * The Cursed Grove
 * The Cursed Hatchery
 * The Cursed Mill
 * The Family of Rathe
 * The Precious Ones
 * The Revenge of Gharbad
 * The Sacrificial Hermit
 * The Scavenged Scabbard
 * Tree of the Hanged

Act II

 * A Miner's Gold
 * Ancient Device
 * Crumbling Vault
 * Guardian Spirits
 * Lair of the Lacuni
 * Lost Treasure of Khan Dakab
 * Prisoners of Kamyr
 * Sardar's Treasure
 * The Cursed Archive
 * The Cursed Battlement
 * The Cursed Chest of the Savage Flock
 * The Cursed Chest of the Fanatics
 * The Cursed Outpost
 * The Cursed Pit
 * The Cursed Shallows
 * The Cursed Spire
 * The Restless Sands
 * The Rygnar Idol
 * The Shrine of Rakanishu

Act III

 * Blaze of Glory
 * Blood Ties
 * Crazy Climber
 * Forged in Battle
 * Protect and Serve
 * Raising Recruits
 * The Cursed Caldera
 * The Cursed Depths
 * The Cursed Garrison
 * The Cursed Glacier
 * Tide of Battle
 * Triage
 * Waiting for Reinforcements

Act IV

 * The Cursed Chapel
 * The Cursed Dais

Act V

 * A Diversion
 * Altar of Sadness
 * Ancient Prison
 * A Shameful Evil
 * A Sister's Voice
 * Bound by Blood
 * Brutal Assault
 * Cryptology
 * Demon Prison
 * Demon Souls
 * Finding the Forgotten
 * Firestorm
 * Grave Robert
 * Grave Situation
 * Hide and Seek
 * Home Invasion
 * Judgment
 * Leap of Faith
 * Lord of Fools
 * Lost and Forgotten
 * Lost Host
 * Lost Treasure of the Nephalem
 * Magic Misfire
 * Necromancer's Choice
 * Noble Deaths
 * Out of the Fire
 * Out of Time
 * Penny For Your Troubles
 * Reach Problems
 * Reliquary of the Nephalem
 * Resurrection
 * The Angered Death
 * The Bogan Haul
 * The Brood Mother
 * The Burning Man
 * The Crystal Prison
 * The Cursed Bone Pit
 * The Cursed City
 * The Cursed Forum
 * The Cursed Peat
 * The Cursed Realm
 * The Cursed War Room
 * The Demonic Prisoner
 * The Golden Chamber
 * The Great Weapon
 * The Harvest
 * The Hatchery
 * The Jewel of Dirgest
 * The Last Stand
 * The Lord of the Hill
 * The Lost Patrol
 * The Miser's Will
 * The Rebellious Rabble
 * The Reformed Cultist
 * The Templar's Reckoning
 * The Time Trap
 * The True Son of the Wolf
 * The War That Time Forgot
 * Tollifer's Last Stand
 * Touch of Death
 * Walk in the Park

Cut

 * Barrel Breaker (unknown)
 * Caravan Defense (Act II)
 * Double Trouble (Act I)
 * Feeding the Island (Act V)
 * Fleshpit Grove (Act I)
 * Goblin Defense (unknown)
 * Grotesque Bowling (Act IV)
 * Hangman's Tree (Act V)
 * Soul Reavers (Act V)

Development
The idea for events was based on the idea of implementing challenges within Diablo III. The original idea was "Challenge Mode.