Below is a walkthrough on the Level 24 Boom or Bust side quest in Horizon Forbidden West. To obtain this quest, speak with Delah at Hidden Ember after completing The Sea of Sands main quest.
Meet Delah at the Arches
Travel east of Hidden Ember to find the arches. Speak with Delah there.
Search for Boomer’s Tracks
Use your focus to locate the tracks then follow them until you reach some ruins.
Kill the Machines
Defeat the enemies in the area.
Investigate the Ruins
Head into the ruins to find a camp. Examine the hammer on the stone floor of the ruins.
Search for Boomer’s Tracks
Use your focus to find a set of tracks nearby leading into the hills.
Follow the Tracks
Follow the tracks to reach a cliff wall.
Climb to the Wreck
Climb up the cliff wall to reach the top of the cliff.
Investigate the Wreck
Head inside the shelter then examine the device near the campfire.
Go to the Wreck
Head down the hill towards the wreck.
Examine the Tools
Examine the tools near Delah.
Kill the Machines
Defeat the enemies.
Talk to Delah and Boomer
Speak with the sisters. (If this quest bugs to where cannot interact with the sisters, reload your last save.)
Follow Boomer
Follow behind her.
Kill the Shellsnapper
Defeat the large machine.
Talk to Delah and Boomer
Speak with the sisters again to complete the quest.
Rewards
- 7800 XP
- 3 Skill Points