There are 6 Order Bunker locations in Borderlands 4. They are one of the activity types required for the Ruler of Everything trophy & achievement.
Order Bunkers are buildings with a boss at the end. Go through the bunker and defeat the boss. They become available after Main Mission 5: One Fell Swoop.
None of the activities are missable. You can still do all of them after the story in free-roam. Some areas require story progress to become accessible, after the story you can reach all of them.
For all activity types refer to Borderlands 4 All Activity Locations.
The Fadefields
The Howl
Order Bunker #1: Blacklime Bunker
Idolator’s Noose
Order Bunker #2: Tipping Point
Carcadia Burn
Grindstone of the Worthy
Order Bunker #3: The Crawlcroft
Heart of the Mountain
Order Bunker #4: Craven’s Nook
The Low Leys
Order Bunker #5: The Wireworks
Dominion
Dominion City is reached during Main Mission 17: The Falling Wall.
Terminus District
Order Bunker #6: Ironwall Resolve
For all other collectibles refer to Borderlands 4 Collectible Guide.
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