Diablo IV: Complete Walkthrough & Boss Guide
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🗺️ Main Story Walkthrough
Tick off each step as you go — your progress saves locally, no account needed.
The prologue follows your character through the snowbound village of Nevesk, where Lilith, daughter of Mephisto and mother of humanity's demonic lineage, is accidentally resurrected from a blood ritual. This opening section establishes the core ARPG loop: kill enemies, collect loot, invest Skill Points, and push into tougher zones. The Prologue boss is X'Fal the Scarred Baron, who serves as a tutorial for telegraphed attack patterns and Stagger Bar mechanics. After completing the Prologue, Acts 1, 2, and 3 can be tackled in any order.
Act 1 is set in the cold northern region of Fractured Peaks and follows the Cathedral of Light's complicity in feeding the Lilith cult. You work alongside Lorath and Neyrelle through Kyovashad and the surrounding mountain zones to infiltrate the Horadric stronghold at Kor Valar and uncover the Horadric artifact. The Act 1 boss sequence includes Vhenard and culminates in Lilith's Lament — a spectral version of Lilith fought in the Tomb of the Firstborn. Stock Fire Resistance consumables before this fight. Completing all Fractured Peaks Cellars and Dungeons here provides significant experience and unique item drops before Act 2.
Act 2 covers the war-torn Dry Steppes region and the politics surrounding Cerrigar, a city under threat from both demon corruption and the Astaroth cult. You investigate the Eldhaime Barracks and trace the source of a devastating demonic weapon program. Astaroth, the Act 2 final boss, rides a three-headed hellhound called the Amalgam of Rage and fights in three distinct phases. Craft or equip a Fire Resistance Elixir before the encounter and bring your highest single-target damage skills for Phase 2, when Astaroth dismounts. Cold damage effects notably slow both Astaroth and his mount throughout the fight.
The longest act sends you through the sand-swept wastes of Kehjistan to recover three ancient blessings from Horadric temples and ultimately confront Brol, the Tyrant King, in the Temple of Primes. Act 3 also deepens the subplot around Neyrelle's growing connection to Lilith. Collect all three blessings before attempting Brol — missing even one makes the encounter significantly harder. The Kehjistan Dungeon system here contains some of the best Legendary item affixes available before Act 4; run at least three or four before proceeding. Brol uses ground-slam telegraphs similar to the Prologue boss but with more overlap between phases.
Act 4 is set in the humid swamps of Hawezar and focuses on recovering the scattered pieces of a weapon capable of wounding Lilith. The act culminates in a fight against Andariel, Maiden of Anguish, in her lair beneath the swamp. Andariel's fight transitions at 25% HP into her original Diablo 2 form, increasing her speed and aggression dramatically. Cap all elemental resistances before entering her lair and equip gear with a +1 Evade Charge affix — her attacks have significant reach and extra evasion charges are extremely valuable. Fill the Stagger Bar whenever possible to create extended free-damage windows.
Act 5 takes you back through multiple regions pursuing Elias, the Horadric cultist who has been aiding Lilith's plan, in three escalating encounters across the Dry Steppes and into the Black Tomb of Sankekur. Act 6, Dance of the Makers, is the epilogue act culminating in the final battle against Lilith in the Cathedral of Hatred. Lilith fights in two completely separate forms with a save checkpoint between them — form one has five health phases and a wing spin attack, while form two shrinks the arena with each phase and requires close-range play to avoid her ranged blood attacks. Reach Character Level 50 before attempting Lilith and max-upgrade your weapon at the Blacksmith. Ration healing potions carefully throughout both forms.
⚔️ Boss Guides
Lilith's Lament
Attack Patterns
Lilith's Lament is a spectral projection of Lilith encountered in the Tomb of the Firstborn at the end of Act 1. She uses wide fire-arc sweeps, ground-impact strikes that radiate outward in a ring, and periodic dive attacks with a telegraphed red targeting indicator. Her attack cadence is slower than later boss encounters, making her a good introduction to the game's pattern-reading expectations.
Strategy
Equip a Fire Resistance Elixir before entering the Tomb — it reduces the damage from her primary fire arcs noticeably. Stay in constant motion; her ground-impact ring attack punishes stationary players severely. Prioritize filling her Stagger Bar with your crowd-control skills to earn a free damage window approximately every 30% HP chunk. Use your highest-damage single-target skill rotation during the Stagger phase and save Evades for her dive attacks, which have a tight dodge window relative to their damage output.
Astaroth
Attack Patterns
Astaroth is the Act 2 final boss, mounted on the three-headed Amalgam of Rage. Phase 1 is controlled by the Amalgam: Flame Breath fires three beams in a fan, and the Amalgam leaps to three random positions in sequence. Phase 2 begins when the Amalgam slumps to regenerate — Astaroth dismounts and attacks personally with meteor rings called inward toward the center and four circular fire waves around the arena edge. Phase 3 forces you to fight both simultaneously while small adds spawn continuously.
Strategy
Stay behind or to the side of the Amalgam during Phase 1 to avoid Flame Breath; it only fires in a forward arc. In Phase 2, ignore the Amalgam completely and commit all damage to Astaroth — defeating the Amalgam only resets Phase 2. Position near the arena edge during meteor rings to avoid the inward cascade and then re-center. In Phase 3, use area-of-effect skills to clear spawning adds before they cluster, but keep your primary resource for Astaroth. Cold damage affixes from gear proc a slow effect on both boss bodies and are disproportionately useful throughout all three phases.
Andariel, Maiden of Anguish
Attack Patterns
Andariel is the Act 4 final boss fought in her lair. Phase 1 uses a dash attack with a short telegraph, a poison projectile arc fired in a front-facing cone, a Y-pattern or wide cone ground attack telegraphed in red, and Hellfire Cascade — thick red lines on the ground that erupt in delayed flame columns. At 25% HP she transforms into her Diablo 2 form, gaining faster movement and more aggressive combo transitions.
Strategy
Cap all elemental resistances before entering the lair — Andariel deals multiple damage types simultaneously and low resistance to any one type results in quickly lethal spikes. Equip gear with the +1 Evade Charge affix since her attacks have deceptive reach and extra dodges remove the margin of error. Stay in constant motion; the Hellfire Cascade punishes static positioning. Prioritize filling the Stagger Bar with crowd-control effects to earn 12-second free-damage windows — burst through entire HP phases during these windows with your highest-damage skill rotation. In her Diablo 2 form, increase dodge frequency and accept fewer offensive trade-offs until you re-learn her faster timings.
Lilith, Creator of Sanctuary (Form 1)
Attack Patterns
Lilith's first form has five health bar sections. She uses a ground-slam fire wave in her facing direction, a wing spin attack she performs while repositioning, fear-inducing circles on the ground that appear at roughly 50% health, and periodic arena-crossing dives. She maintains mobility throughout and rarely stays stationary for more than two to three seconds.
Strategy
Keep distance to give yourself time to read her attack animations and reposition ahead of fire sweeps. The wing spin is her most telegraphed high-damage attack — dodge through it toward her body to avoid the damage and position for a counterattack. Move out of the fear circles immediately when they appear; the fear effect disables your skills and makes you a stationary target. Fill her Stagger Bar consistently to earn 12-second free-damage windows where you can burst through a full health section. Do not rush — overcommitting to offense rather than reading her patterns causes the most deaths in this form.
Lilith, Daughter of Hatred (Form 2)
Attack Patterns
Lilith's second form completely refills her HP bar and transitions the fight to a closing-arena style. She summons four exploding blood orbs around the battlefield with lingering ground patches, disappears and flies across the room while blood pools sweep large areas, and periodically destroys arena sections permanently, shrinking the safe ground. Her attacks are predominantly ranged in this form, rewarding close-range play over the first form's distance-management style.
Strategy
Unlike Form 1, stay close to Lilith throughout — most of her Form 2 attacks are ranged and close proximity often places you inside the effective radius of her patterns. Destroy the four blood orbs immediately when summoned to prevent their explosion from stacking with the ground-patch lingering damage. When she begins the arena-sweep flight pattern, move toward the incoming blood path rather than retreating; there is a narrow safe corridor at the leading edge of each sweep. Commit high-damage skill rotations aggressively — the arena shrinks throughout the fight and prolonging it makes later phases substantially harder as safe space diminishes.