If you’re stuck in the brutal Chasm of Xal-Goroth mission in Doom: The Dark Ages, you’re not alone. Chapter 4 is where the game really starts testing your combat skills, movement, and puzzle-solving under pressure. As a longtime Doom fan, I found this mission both exhilarating and frustrating — especially the final boss encounter.
This guide gives you a clear, step-by-step walkthrough to complete the mission efficiently while grabbing most of the secrets.
Table of Contents
Doom Chasm of Xal-Goroth Full Walkthrough
| Step | Objective | Tips & Strategy |
|---|---|---|
| 1 | Reach the first rune altar | Clear cultists quickly using the Shotgun. Look for a hidden wall on the left for armor. |
| 2 | Destroy the 3 Corruption Crystals | Use the new Slayer weapon to break them from a distance. Watch for ambushes after each one. |
| 3 | Navigate the collapsing bridge section | Time your dashes carefully. There’s a secret chest on a small ledge to the right. |
| 4 | Defeat the Dread Knight mini-boss | Stay mobile. Use the Shield Throw to stagger him, then unload with the Super Shotgun. |
| 5 | Solve the rune alignment puzzle | Match the symbols with the ones carved on nearby pillars (Left → Right → Middle). |
| 6 | Final Boss: Xal-Goroth | Focus on destroying his 3 weak points. Use the flamethrower to clear adds while dodging his slam attacks. |

Pro Tips:
- Prioritize upgrading your Shield and Flame Belch before this mission — they make a huge difference.
- There are 3 secret encounters and 2 weapon upgrades hidden in this chapter. Explore every corner.
- Save your Blood Fuel for the final boss fight.
Completing this mission unlocks new upgrades and progresses the main story. The boss fight is tough but incredibly satisfying once you learn the patterns.
For more Doom: The Dark Ages help, check our Doom The Dark Ages Best Weapons Guide and Beginner Tips for New Players on Technosports.
Learn more about the game on Doom (franchise) (Wikipedia).
FAQs
How do you solve the rune puzzle in Chasm of Xal-Goroth?
Match the glowing symbols with the ones carved on the nearby stone pillars in order from left to right.
Is the final boss in Chapter 4 hard?
Yes, especially on higher difficulties. Focus on destroying his weak points and use the flamethrower to manage the adds.