Diablo 3 Walkthrough Act III

September 12, 2016 (Last Updated: ) | Reading Time: 7 minutes

This Diablo 3 walkthrough is divided into 4 total pages.

You can jump to nearby pages of the game using the links above.

Act III

Diablo 3 Walkthrough - Diablo 3 221
Diablo 3 Walkthrough - Diablo 3 221

Act III is pretty hectic. The main town you'll be using is constantly under siege and enemies even pour into the town later on. Begin by talking to Tyrael.

Diablo 3 Walkthrough - Diablo 3 222
Diablo 3 Walkthrough - Diablo 3 222

Walk down the stairs to the Armory.

Diablo 3 Walkthrough - Diablo 3 223
Diablo 3 Walkthrough - Diablo 3 223

There will be a little scene between Adria and Leah playing out here. You can watch it or go into Bastion's Keep Stronghold.

Diablo 3 Walkthrough - Diablo 3 224
Diablo 3 Walkthrough - Diablo 3 224

Explore the city until you're familiar with it and then take the path Northeast and head into the Skycrown Battlements.

Diablo 3 Walkthrough - Diablo 3 225
Diablo 3 Walkthrough - Diablo 3 225

You'll have to light the five bonfires here. Follow the path and light the bonfires along the way. I've got all five bonfires lit in this picture and their locations. They should be exactly or at least relatively near what my map says. The orange fires are the bonfires.

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Diablo 3 Walkthrough - Diablo 3 226

Talk to Sergeant Dalen.

Diablo 3 Walkthrough - Diablo 3 227
Diablo 3 Walkthrough - Diablo 3 227

Walk into Stonefort.

Diablo 3 Walkthrough - Diablo 3 228
Diablo 3 Walkthrough - Diablo 3 228

Follow the path until you reach Captain Haile and talk to him. Enemies will spawn from the grate and then from the elavtor that comes up. Kill them and proceed to the first catapult you need to raise.

Diablo 3 Walkthrough - Diablo 3 229
Diablo 3 Walkthrough - Diablo 3 229

At the first catapult, talk to Sergeant Burroughs. Go Northwest a little and kill the demons attacking the barracks.

Diablo 3 Walkthrough - Diablo 3 230
Diablo 3 Walkthrough - Diablo 3 230

Once you kill the demons and free the workers, they'll start to raise the catapult themselves. Just stand beside them and protect them while they do their thing. The less that die, the faster it'll raise. Once you finish here, continue to the second catapult.

Diablo 3 Walkthrough - Diablo 3 231
Diablo 3 Walkthrough - Diablo 3 231

At the second catapult, talk to Lieutenant Lavail. He'll tell the the workers in the barracks to come out and start doing their jobs. Same as the first one, protect the workers, just there are more enemies this time.

Diablo 3 Walkthrough - Diablo 3 232
Diablo 3 Walkthrough - Diablo 3 232

After you finish with the second catapult, head onwards to the third catapult and talk to Lieutenant Clyfton.

Diablo 3 Walkthrough - Diablo 3 233
Diablo 3 Walkthrough - Diablo 3 233

There won't be any workers helping you with this catapult. It'll just be you, Lieutenant Clyfton, and tons of demons. You can click on the winch every few seconds, but don't forget to kill the demons that spawn as they'll continue to spawn until the catapult is raised.

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Diablo 3 Walkthrough - Diablo 3 234

After you raise the third and final catapult, teleport back to town and talk to Tyrael.

Diablo 3 Walkthrough - Diablo 3 235
Diablo 3 Walkthrough - Diablo 3 235

Head Northwest and kill the demons attacking the stronghold, then enter from where they came, The Keep Depths Level 1.

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Diablo 3 Walkthrough - Diablo 3 236

Explore this area until you find The Keep Depths Level 2 and enter it.

Diablo 3 Walkthrough - Diablo 3 237
Diablo 3 Walkthrough - Diablo 3 237

Explore this area until you find The Keep Depths Level 3 and enter it.

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Diablo 3 Walkthrough - Diablo 3 238

Explore this area until you find The Larder. This is your first main boss to fight in this Act. Ready yourself and enter.

Diablo 3 Walkthrough - Diablo 3 239
Diablo 3 Walkthrough - Diablo 3 239

He has two main abilities he uses. He summons little yellow gobs like the ones here and he puts clouds of poisonous gas on the ground at your location from time to time that last for a while. If you take too long to kill him, he'll increase his rate of spawning poisoning clouds and you will eventually not be able to move without running into a cloud.

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Diablo 3 Walkthrough - Diablo 3 240

Once you defeat him, teleport to town and talk to Lieutenant Lavail.

Diablo 3 Walkthrough - Diablo 3 241
Diablo 3 Walkthrough - Diablo 3 241

Head right and into the Armory.

Diablo 3 Walkthrough - Diablo 3 242
Diablo 3 Walkthrough - Diablo 3 242

A scene will play out. Talk to Leah when you can.

Diablo 3 Walkthrough - Diablo 3 243
Diablo 3 Walkthrough - Diablo 3 243

Head back to the stronghold and go Northeast, straight across the bridge and into The Arreat Gate.

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Diablo 3 Walkthrough - Diablo 3 244

Follow the path until you reach Sergeant Pale and talk to him.

Diablo 3 Walkthrough - Diablo 3 245
Diablo 3 Walkthrough - Diablo 3 245

Explore the area until you find the Bridge of Korsikk and cross it. Explore the next area and find and destroy the three Demonic Ballistae and the Trebuchet. Their locations are on the map shown here, or at least one possible set of locations if its randomized every game.

Diablo 3 Walkthrough - Diablo 3 246
Diablo 3 Walkthrough - Diablo 3 246

Head Northeast until you reach Rakkis Crossing. Tyrael will be here. Talk to him and then continue following the path.

Diablo 3 Walkthrough - Diablo 3 247
Diablo 3 Walkthrough - Diablo 3 247

Follow the path until you reach the Edge of the Abyss. This is another major boss fight. Prepare yourself and enter.

Diablo 3 Walkthrough - Diablo 3 248
Diablo 3 Walkthrough - Diablo 3 248

The Siegebreaker Assault Beast has few troublesome abilities he can use. One of his abilities is to grab (if you're close enough) and just squeeze you for pretty decent damage. He'll also summon these giant demons on the sides that will spawn the demon beserkers. If you can't kill the boss fast, I recommend killing them first so you don't get overwhelmed with enemies. He'll also do some ground sweeps with his claws in front of him, easy to avoid.

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Diablo 3 Walkthrough - Diablo 3 249

Once you defeat him, head a little south and talk to Adria.

Diablo 3 Walkthrough - Diablo 3 250
Diablo 3 Walkthrough - Diablo 3 250

Go to where the Siegebreaker began and enter the Arreat Crater Level 1.

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Diablo 3 Walkthrough - Diablo 3 251

Follow the path until you reach the Tower of the Damned Level 1 and enter it. Explore it until you find the Tower of the Damned Level 2 and enter that.

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Diablo 3 Walkthrough - Diablo 3 252

Explore the Tower of the Damned Level 2 until you find the Heart of the Damned and enter it.

Diablo 3 Walkthrough - Diablo 3 253
Diablo 3 Walkthrough - Diablo 3 253

Follow the path until you reach the Sin Heart here. Cydaea will drop down and defend it. Damage Cydaea until she runs away and the magic guarding the Sin Heart will dissapate. Kill the Sin Heart.

Diablo 3 Walkthrough - Diablo 3 254
Diablo 3 Walkthrough - Diablo 3 254

Go Northwest and follow the path until you reach the Arreat Crater Level 2 and enter it.

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Diablo 3 Walkthrough - Diablo 3 255

Follow the path until you reach the Tower of the Cursed Level 1 and enter it.

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Diablo 3 Walkthrough - Diablo 3 256

Follow the path until you reach the Tower of the Cursed Level 2 and enter it.

Diablo 3 Walkthrough - Diablo 3 257
Diablo 3 Walkthrough - Diablo 3 257

Follow the path until you reach the Heart of the Cursed. You will face off against Cydaea for serious this time and won't be able to change your abilities inside until you kill her. Prepare yourself and enter.

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Diablo 3 Walkthrough - Diablo 3 258

Cydaea is pretty easy. She'll shoot some bolts of venom at you sometimes, spawn some minions, but not much to worry about. Kill her, then kill the Sin Heart.

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Diablo 3 Walkthrough - Diablo 3 259

Go behind the destroyed Sin Heart and follow the path until you reach The Core of Arreat and enter it.

Diablo 3 Walkthrough - Diablo 3 260
Diablo 3 Walkthrough - Diablo 3 260

Follow the path until you reach the Heart of Sin. This is the final boss in this Act, the Lord of Sin.

Diablo 3 Walkthrough - Diablo 3 261
Diablo 3 Walkthrough - Diablo 3 261

Azmodan will have three abilities you will need to watch out for. His most common one is this fireball that chases you around a few seconds then explodes on either hitting you or in mid-air if it doesn't reach you. He'll summon demons and portals for demons. You should kill them both, demons and demonic portals, if you can't kill Azmodan fast enough. As you are fighting Azmodan, he will leak this red/black ooze heading towards the center of the map. If you can't kill Azmodan fast enough, the entire area will be covered in the ooze and you'll have no safe spot to be in.

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Diablo 3 Walkthrough - Diablo 3 262

Once you kill Azmodan, collect his Soul and teleport to town.

Diablo 3 Walkthrough - Diablo 3 263
Diablo 3 Walkthrough - Diablo 3 263

Talk to Sergeant Lavail.

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Diablo 3 Walkthrough - Diablo 3 264

Head to the Armory.

Diablo 3 Walkthrough - Diablo 3 265
Diablo 3 Walkthrough - Diablo 3 265

Enter the Bastion's Keep Watchtower.

Diablo 3 Walkthrough - Diablo 3 266
Diablo 3 Walkthrough - Diablo 3 266

After the cutscene, click the Portal to Heaven and you'll be done with Act III and onto Act IV!

More Diablo 3 Walkthroughs

This Diablo 3 walkthrough is divided into 4 total pages.

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